Which comedian guest-starred as himself in the 30 Rock episode "SeinfeldVision"?

Jerry Seinfeld guest-starred as himself in the 30 Rock episode “SeinfeldVision.”

“SeinfeldVision” is the season-two premiere of 30 Rock, which first aired on October 4, 2007. In the episode, NBC executive Jack Donaghy proposes a bizarre promotional scheme: a month of programming built around Jerry Seinfeld, using edited footage from Seinfeld to insert him into other shows. Seinfeld arrives at 30 Rock to confront Jack about the plan.

The storyline was a satirical take on television promotion, celebrity branding and the way networks try to exploit familiar intellectual property. Jack and Jerry eventually agree to reduce the ambitious month-long campaign to a single night. Seinfeld’s presence also gives the episode a self-aware connection to NBC’s sitcom history.

The guest appearance is sometimes confused with a conventional fictional role. Jerry is not playing a new character or a 30 Rock employee; he appears as Jerry Seinfeld. The episode also includes jokes connected to his public image and the promotion of his animated film “Bee Movie,” which was released in 2007.