"The Keys" - Season 3 Episode 23 of Seinfeld Premiers
"The Keys" is the fortieth episode of the sitcom Seinfeld.
The episode was the 23rd and final episode for the third season and the first of a three-episode cliffhanger. It aired on May 6, 1992.
In a montage of incidents, Jerry returns home only to find that Kramer has overstayed his welcome; Kramer had been using the spare set of keys Jerry had left with him. Exasperated, Jerry demands his spare keys back, angering Kramer. Knowing that he has broken the "covenant of the keys," Kramer arrives at the realization that he is now free to come out of the shadows. Kramer takes off for California to follow his dream of becoming an actor after he is unable to convince George to join him.
Jerry gives his spare keys to Elaine. Soon after he desperately needs them and goes to Elaine's home with George (who has spare keys to her place), to search for his spare set. They end up finding Elaine's writing project for an episode of Murphy Brown. As they read and laugh over it, Elaine walks in and screams at them to leave for invading her privacy.
Jerry is unable to locate Kramer and make amends. One night while watching Murphy Brown with Elaine, Jerry sees Kramer in a famous bit part on Murphy Brown as Murphy's new secretary, "Steven Snell." Surprisingly, Murphy says that she "has a good feeling" about Steven.