Leonard is working nights at the university and can’t drive Sheldon to work. Sheldon then tries all his other possible chauffeurs, which are his other friends. This starts to become a huge burden on everyone, who decide on helping him get his license.
Leonard comes through the door and falls to the couch due to exhaustion, and then Sheldon comes and demands Leonard to drive him around to run his various errands including returning the Star Wars sheets that are too distracting to sleep on. Leonard refuses as he is far too exhausted because of working late in his lab at the university. Sheldon refuses to take the bus because they won't let him bungee cord himself to the seat since they have no seat belts.
Sheldon then tries his luck with Penny who was sleeping in because it was her day off. He then asks her to do him a favor. The two set off in her car and Sheldon continually annoys Penny about her check engine light and the speed bumps starts quoting studies about distracted driving, which only annoys her. He also gives her pointless factoids and tries to play Periodic Table game with her. Penny then ejects him from her car and he has to walk to work.
At he university and he stumbles into Leonard and Howard. He again asks Leonard to drive him and Leonard again refuses, but Howard took Sheldon's side just for fun, which he came to regret as he was forced to take Sheldon home. Sheldon screams at Howard while riding on the back of his scooter and driving over the speed bumps on Euclid Avenue. Unsurprisingly, Sheldon gets left in the middle of the road again. This time Raj picks Sheldon up and drives him home, but after pestering Raj with a lot of requests, he just drops him off at the stairs. Sheldon arrives at the apartment, makes one final desperate attempt to ask Penny to drive him and gets the door slammed in his face.
The following morning, Sheldon wakes up to see the gang assembled in the living room waiting for him. The gang has an intervention, wants Sheldon to learn driving and because of a Rock-Paper-Scissors contest, Penny is forced to drive him to the DMV along with Howard. Sheldon was too busy at sixteen with his work to learn how to drive. After getting his written driving test, he annoys the disinterested DMV clerk with a number of questions about the mathematics and physics of the driving regulations. Finally, the clerk gives Sheldon a Learner's Permit just to get him to leave. Sheldon feels superior, quipping "aced it".
In an effort to help Sheldon learn to drive, Howard sets up a "state of the art" driving simulator. Sheldon doesn't want a red car because he believes that red cars are stopped more often by police. Sheldon attempts to drive, but fails horribly. When he crashes his vehicle, Penny hits him in the face with a pillow because Sheldon objected to the simulator not being able to replicate an airbag going off. He gives up on trying to learn to drive with the excuse "I'm clearly too evolved for driving". It seemed that his species could be a "homo novus"; however, future anthropologists will have to decide what his classification is.
Because Sheldon doesn't have a way to get to the university, he decides to set up a temporary home there until Leonard finishes his experiment; however, it turns out that Leonard has finished his experiment a week ago, but purposely did not tell Sheldon. In the cafeteria, the staff sees bread crumbs on a plate. First they think rats caused the problem which is illogical due to the bread crusts (that were cut off) on the plate, but when the clock struck twelve, they are terrified when they see Sheldon lurking in the shadows of the dark cafeteria like a ghost in a haunted house, then Sheldon slowly turns around and says to them in a ghost-like voice "You saw nothing!" and then vanishes out the door.
- Guest starring:
- Teleplay: Steven Molaro & Bill Prady
- Story: Lee Aronsohn & David Goetsch
- "The humour throughout is solid and fits the characters involved... [t]he plot on the other hand is poor. Again we get way too much Sheldon. There is only so much one can take before he becomes tiresome.' - The TV Critic's Review
- IMDb user reviews
- Title Reference: When in the car with Penny, Sheldon says to Penny "You're going up Euclid Avenue? Leonard takes Los Robles Avenue."
- Chuck Lorre's vanity card 
- This episode was watched by 9.28 million people with a rating of 3.5 (adults 18-49).
- Episode transcript 
|Sheldon wears his orange Space Invaders tee, his BDG purple shirt with gray stripes and yellow accent (discontinued from Urban Outfitters), and his black with light blue plaid tee by Kierra (also discontinued).|
|Leonard starts out in a red tee with a shard design, then is sporting a capsaicin molecule t-shirt (the stuff that makes chili peppers hot, makes pepper spray a great defense agent, and, ironically, has pain-relieving and numbing qualities) from ThinkGeek. He also wears a dark green shirt with light freen amorphus figures, and ends with an unknown blue tee (his jacket covers too much to get a good look).|
|Howard wears his Nintendo controller belt buckle, his primary colors chekered Vans, his red Vans with white laces, his red and white checkered belt, and a belt buckle with three lightning bolts.|
- A rare camera view of Leonard and Sheldon's apartment is shown from the vantage of the hallway that's normally seen to the back right, going to the bedrooms, allowing us to see the "4th wall" in the front of the apartment normally is missing.
- Sheldon spends a huge part of this episode trying to get someone to take him to return his Star Wars sheets. He feels they are too stimulating to be compatible with a good night's sleep. He doesn't like the way Darth Vader stares at him. After annoying his friends so much that they won't take him to Pottery Barn to return the sheets, Sheldon ponders if turning off his nightlight will allow him to tolerate the sheets.
- Penny stated in "The Bad Fish Paradigm" (S2E1) that she and Sheldon are friends.
- The Euclid Avenue that gives the episode its title we learn is an alternative to Los Robles Avenue, which are two parallel streets in Pasadena, CA. Also the real Euclid Avenue actually does have speed bumps just like it is depicted in the show.
- Raj's name was not mentioned at all in this episode.
- Sheldon complains about the check engine light in Penny's car for the first time in this episode, later mentioning it again in "The Financial Permeability"(S2E14), "The Adhesive Duck Deficiency" (S3E8) and "The Plimpton Stimulation" (S3E21). Leonard's mother similarly makes a point of this observation in "The Maternal Congruence" (S3E11) as does Amy Farrah Fowler in "The Robotic Manipulation" (S4E1). Penny says, "The light has been on since I bought the car," in "The Adhesive Duck Deficiency" (S3E8), but there is no statement regarding the light in "The Luminous Fish Effect" (S1E4). The car eventually dies and Leonard buys her a new one.
- Leonard and Sheldon's element naming game is by nature a short game, since so many elements end with the letter M (most have names ending with the "-ium" suffix, with the exceptions usually being elements known since pre-enlightenment times, such as iron, sulfur, or lead), and so few start with it (only Mercury, Molybdenum, Magnesium, Manganese, and Mendelevium, unless you count Meitnerium, which Sheldon doesn't). By comparison, there are nearly 120 elements in total currently listed in the periodic table, over a hundred of which have "proper" names (with the remaining elements all being unstable super-heavy elements which, due to only recently having been synthesized, so far only have their systematic designated names until a proper name can be agreed upon for them).
- Sheldon never quits, but in this case he "transcends the situation" and stops trying to learn how to drive.
- The DMV worker is played by the Oscar-winning actress Octavia Spencer who starred in movie The Help in 2011.
- The work that Sheldon mentioned at the DMV, "Examining perturbative amplitudes in N=4 supersymmetric theories leading to a re-examination of the ultraviolet properties of multi-loop N=8 supergravity using modern twistor theory" was a reference to the 2011 paper "Amplitudes and Ultraviolet Behavior of N=8 Supergravity", by Zvi Bern, a professor of theoretical physics at UCLA (available at ). David Saltzberg (the science consultant for the show), mentioned this in his 2013 NPR interview "The Man Who Gets The Science Right On The Big Bang Theory".
- Studies indicate that Sheldon is correct about red vehicles being pulled over more often, but, contrary to popular belief, they aren't more accident prone or subject to higher insurance rates.
- Penny is aware, before Leonard, of Sheldon having lashed himself to the seat of a bus with bungee cords - this highlights the growing friendship between Penny and Sheldon.
- This was the second episode with a brief scene in the style of a cinematic horror film. The first was "The Nerdvana Annihilation". Sheldon screams in both episodes.
- Assuming the apartment building is located at 2311 N Los Robles Ave., the length of the drive to the Caltech campus (some 4 miles according to Google Maps)roughly corresponds to the length of the car scene assuming a languid driving pace (also corresponding to the apparent speed of the car in the scene). However, there are no apartment buildings at or around the real-world 2311 N Los Robles Ave. (verifiable through Google Street View).
- If the apartment's location were instead taken to be the one from the satellite photo zoom-out from Howard and Bernadette's rooftop wedding scene, 215 S Madison Ave. (which is an apartment building, but only a three-story one), then the distance to the Caltech campus is only about 1 mile (some 10 blocks), much too short for a car ride of the length seen (and, in fact, short enough to walk comfortably, preempting Sheldon's need to be driven to work).
- Even though Sheldon points in the direction of the front left corner in the Pilot, stating that there is a cold breeze between the window in the back and the window in the front left corner, there is no window, when the front left corner is shown.
- Even though Sheldon says "Scientists do not apologize", he apologizes here, by saying "I'm sorry. I'm finding your reckless nonchalance regarding the check-engine light to be very troubling."
- In the motorcycle scene when Howard drives his motorcycle over the speed bump, it appears that stunt actors were possibly used. This is noticeable when Sheldon's scream is dubbed in the far camera shots before the next scene.
- (Sheldon is trying to get to go to work, but Leonard can't drive him and he has to find a alternative.)
- Sheldon: How am I going to get to work?
- Leonard: Take the bus.
- Sheldon: Oh, I can't take the bus anymore. They don't have seat belts, and they won't let you lash yourself to the seat with bungee cords.
- Leonard: You tried to lash yourself to the seat with bungee cords?
- Sheldon: I didn't try, I succeeded.
- Leonard: Look, I need to get to the laser lab. You're just going to have to find someone else to take you home.
- (Sheldon eyes Howard)
- Howard: (upset) Oh, damn. I picked the wrong side.
- (Scene: outside, Howard is taking Sheldon home on his moped.)
- Sheldon: Aaaahhhh!! Oh, God! Not Euclid Avenue! Aaaaahhh!!
- DMV clerk: See that sign?
- Sheldon: Yes.
- DMV clerk: Does it say "I give a damn"?
- Sheldon: No.
- DMV clerk: That's 'cause I don't. Next!
- Sheldon: Oh, good. I’m not keeping you from anything. Your check engine light is on.
- Penny: Mm-hmm.
- Sheldon: Typically that’s an indicator. To, you know, check your engine.
- Penny: It’s fine, it’s been on for, like, a month.
- Sheldon: Well, actually, that would be all the more reason to, you know, check your engine.
- Penny: Sheldon, its fine.
- Sheldon: If it were fine, the light wouldn't be on. That’s why the manufacturer installed that light, to let you know it’s not fine.
- Penny: Uh, maybe the light’s broken.
- Sheldon: Is there a “check the 'check engine light' light”? (Penny takes a drink of coffee) O-o-o-oh!
- Sheldon: Well, no, no, I’m not going to go so far as to say that I represent a distinct new stage in humankind, you know, a Homo novus, if you will, no, that’s for anthropologists to decide. But I am convinced that the reason I cannot master the plebeian task of driving is because I’m not meant to.
- Sheldon: (After being spotted in the cafeteria at night.) You saw nothing.