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The Big Bang Theory

Timeline of Events that Happened in the Fifth Season

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Timeline
This chronology is a timeline of events that happened during the Fifth season or approximately June, 2011 to May, 2012

The Timeline

2011 Amy starts shaving her legs The Vacation Solution

88. “The Skank Reflex Analysis”

June 4, 2011 – Leonard has an analysis session with his mom

Saturday, June 6, 2011 – the boys play paintball –penny gets commercial

day 3 – watch commercial  -much later

89. "The Infestation Hypothesis"

June 9, 2011 – Leonard’s dinfast with Priya

June 10, 2011 – Sheldon tries to get rid of Penny’s new chair

June 11, 2011 – Howard demonstrates cybersex devices, the chair thrown out

90. "The Pulled Groin Extrapolation"

June 16, 2011 – Amy stays & drafts Leonard to attend a wedding with her, Howard  and Bernadette fight about where they’re going to live

Friday, June 17, 2011 – Leonard & Amy go to a wedding 

Saturday, June 18, 2011 – Bernadette serves Howard breakfast

91. "The Wiggly Finger Catalyst"

June 23, 2011 – Howard & Bernadette register at Macy’s

June 24, 2011 – play D&D

June 25, 2011– Raj meets Emily

July 25, 2011 – learn Raj rich, Raj gives gifts to Emily 

July 26, 2011 -  Penny confront Emily

July 27, 2011 - Raj dumps Emily due to parents threat

July 28, 2011 – Raj seeks comfort from Penny 

92. "The Russian Rocket Reaction"

October 6, 2011 – Howard going to space, invited to Wil Wheaton’s party

October 13, 2011 – discussion of Bernadette telling Howard’s mom about space

October 14, 2011 – Wil Wheaton’s party

93. "The Rhinitis Revelation"

October 20, 2011 – Mrs Cooper arrives

October 22, 2011 – Sheldon & mom do laundry

October 23, 2011 – tour Hollywood, Sheldon gets sick

94. "The Good Guy Fluctuation"

October 27, 2011 – Howard & Raj scare Sheldon

October 28, 2011 – Leonard meets Alice

October 29, 2011 – Leonard talks with Penny, ends it with  Alice & Priya

95. "The Isolation Permutation"    

November 3, 2011 – discussion of bridesmaid dresses

November 4, 2011 – Penny & Bernadette go shopping

November 5, 2011 – guys tell Penny & Bernadette that Amy upset

November 6, 2011 – Penny & Bernadette talk to Amy who gets drunk

November 7, 2011 – Bernadette asks Amy to be maid of honor

November 8, 2011 – Penny, Amy & Bernadette go shopping

96. "The Ornithophobia Diffusion"

November 10, 2011 – Leonard & Penny go to movies, Sheldon terrorized by bird

97. “The Flaming Spittoon Acquisition”

November 17, 2011 – Stuart meets Amy

November 18, 2011 – Stuart texts Amy

November 19, 2011 – Stuart & Amy date

November 20, 2011 – boys play mystic warlords

November 21, 2011 – Sheldon asks Penny out, then asks Amy to be girlfriend

November 22, 2011 – girls play twister

98. "The Speckerman Recurrence"

December 10, 2011 – Leonard gets e-mail from Jimmy Speckerman

December 11, 2011 – Leonard meets Jimmy Speckerman, girls visit charity bin

December 12, 2011 – Jimmy Speckerman chases Sheldon & Leonard, girls return to bin

Jan, 2012 Penny dings a Mercedes, but doesn’t leave note [The Vacation Solution]

99. "The Shiny Trinket Maneuver"

Thursday, January 12, 2012 –  Sheldon & Amy on date & gets upset

January 13, 2012 – Penny and Sheldon go jewelry shopping

100. “The Recombination Hypothesis”

January 19, 2012 – Leonard asks Penny out

101. “The Beta Test Initiation”

January 19, 2012 – Leonard & Penny’s date

January 20, 2012 – they watch Dr. Who

January 21, 2012 – Siri dinner & shooting range

102. "The Friendship Contraction"

February 2, 2012 – Leonard drives Sheldon to train store in Garden Grove 

February 3, 2012 – they end roommate agreement

February 4, 2012 – power outage

February 5, 2012 – Howard talks to Mass

103. "The Vacation Solution"

Friday February 10, 2012 -  Dr. Seibert tells Sheldon must take vacation

Monday, Feb. 13, 2012 -  Sheldon tries to sneak in to work

February 14, 2012 – Sheldon at Amy’s lab

February 15, 2012 – Sheldon apologizes

February 16, 2012 –Howard & Bernadette discuss pre-nup

104. "The Rothman Disintegration”

February 16, 2012 – Prof Rothman’s retirement party

February 17, 2012 – Amy gives picture

February 18, 2012 – Sheldon & Kripke argue

February 19, 2012 – Sheldon & Kripke play basketball

February 20, 2012 – Sheldon moves in office

105. "The Werewolf Transformation"

February 23, 2012 – Sheldon doesn’t get haircut from Angelo 

Monday, February 24, 2012 -  Howard in Houston, Sheldon at hospital

February 25, 2012 – Howard returns from survival training

February 26, 2012 – Bernadette goes to Houston, mom already there, Penny cuts       Sheldon’s hair

106. "The Weekend Vortex"

March 8, 2012 - games weekend proposed

March 9, 2012 – Sheldon shops at comic book store for present for Amy’s aunt Flora 

Saturday, March 10, 2012 – 93rd b-day party Amy’s aunt flora, Amy makes scene

107. "The Transporter Malfunction”    

March 29, 2012 – discuss Raj wants to get married

March 30, 2012 – meets Lakshmi

March 31, 2012 – date with Lakshmi, Sheldon breaks toy  `

April 1, 2012 – Raj ends with Lakshmi, Sheldon confesses

108. “The Hawking Excitation"

April 5, 2012 – Howard says Hawking coming to Cal Tech

April 6, 2012 – talk about Hawking

April 7, 2012 – Sheldon cleans Howard’s belt buckles 

April 8, 2012 – Sheldon dresses as French maid

April 8, 2012 – Sheldon shops with Mrs. Wolowitz

April 10, 2012 - meets Hawking, faints

109. “The Stag Convergence”

April 26, 2012 – discuss bachelor party

April 27, 2012 – bachelor party

110. "The Launch Acceleration"

May 3, 2012 – mission cancelled

May 10, 2012 – guys shop, Amy & Sheldon’s date. Leonard proposes

111. “The Countdown Reflection"

Friday – May 10, 2012 – Howard gives star necklace

Sunday May 12, 2012 – wedding of Howard & Bernadette

May 15, 2012 – Howard is launched into space

.

Notes

It is presumed that the first day of an episode is the date that episode was broadcast, but there are exceptions as in this season. 'The Wiggly Finger Catalyst' takes a month and would mess up the rest of the timeline.if it happened on the broadcast date.

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