In "The Celebration Experimentation", Adam West attends Sheldon's birthday party at the invitation of the other guys. Sheldon's sister had teased him that Batman would attend his sixth birthday party and he spent all day waiting for him. After picking Adam up, Adam thinks that Michael Keaton was the best Batman until they add the topic of adding humor to the role. Then he should be listed as the best Batman. He also pointed out that while every other man who played Batman used built-in muscles, his Batsuit contained his own muscles ("100% pure, grade-A West"). At the party Adam calls Sheldon "Sherman" and when he toasts him Adam mentions that he is available for other events. After Sheldon disappears into the bathroom, Adam says that he still has to be paid. Stuart mentioned that he is something of a diva. After Sheldon blew out his candles, Adam demanded that someone take him home.
He died on June 9, 2017, in Los Angeles after a short battle with Leukemia at age 88.