The Frogger

"The Frogger" is the 174th episode of the NBC sitcom "Seinfeld". It is the 18th episode for the ninth and final season. It first aired on April 23, 1998.
Plot.
Elaine is confronted with cake from two separate celebrations at her workplace; tired of the forced socializing, she calls in sick the next day. Jerry and George go to their old high school hangout, Mario's Pizza Parlor, for one last slice of pizza before it closes down. Kramer has visited the police station where he obtained some caution tape used for crime scenes and also heard about a serial killer nicknamed "The Lopper" who is on the loose in the Riverside Park area.
At Mario's, George discovers he still has the high score on the old "Frogger" arcade game, with a score of 860,630 points; both Jerry and he then remember that they stopped going to Mario's because he had a tendency to insult his customers. Elaine's co-workers surprise her in her office with a cake to celebrate her return to work from being sick, but she rejects it and refuses to take part in any future celebrations. Jerry dates Elaine's friend Lisi (Julia Campbell) and discovers that she's a sentence-finisher: "It's like dating Mad Libs!" After lamenting that his shrine will be gone, George decides to buy the "Frogger" machine to preserve his fame. But when Jerry asks how he will be able to keep it plugged in while he moves it, and not erase the high score, George's excitement suddenly turns to dismay. Kramer discovers that the last victim of the Lopper looked a lot like Jerry.
George works to find a solution to his "Frogger" problem, and Kramer volunteers the help of a man he knows named "Slippery Pete" (Peter Stormare). Missing the 4 o'clock sugar-rush she had become used to from all the office celebrations, Elaine raids her boss Peterman's mini-refrigerator, where she finds a slice of cake. Later, Peterman reveals he bought it for $29,000 because of its historical significance: it is from King Edward VIII's wedding to Wallis Simpson.
Jerry wants to break up with Lisi, then discovers she lives in the Riverside Park area. To avoid the Lopper, he takes her back to his place, where she finishes one of his thoughts that takes their relationship to the next level. Elaine tells Jerry and George about the cake, then tells Jerry that Lisi is planning a weekend trip for them to Pennsylvania Dutch country. Jerry fears that Lisi received the wrong message; a trip like that means it is a serious relationship! Elaine tries to even out Peterman's slice of cake, but gets swept up in the moment and finishes it off. George and Kramer meet with Slippery Pete and truck driver Shlomo (Reuven Bar Yotam), to coordinate the movement of the "Frogger" machine. Elaine later looks for a replacement for Peterman's cake, and Kramer suggests an Entenmann's cake. 
Jerry goes to Lisi's apartment, where he tries to break up with her. After a grueling ten hours, Jerry finally leaves the apartment, only to find out it is now dark outside. He sees a shadowy figure approaching whom he fears is the "Lopper" and pleads that Lisi let him back inside; the man turns out to be just "Slippery Pete", stealing a battery for the planned "Frogger" scheme. Peterman is bewildered when he has his slice of cake appraised at only $2.19, while Elaine feigns ignorance, and attempts to cheer him up. Jerry reveals to George that Lisi took him back, but with the price that he will be going to Pennsylvania Dutch country with her for "a long, long weekend." George finds "Slippery Pete" playing his "Frogger" game on battery power until only about three minutes of power remain. The only available power source is across the busy street, and Kramer has run out of caution tape. Convinced he does not need any help, George starts moving the machine across the busy street, moving through traffic like the frog from the video game. However, as George reaches the opposite sidewalk, he is unable to lift the game onto the curb; an oncoming Freightliner smashes the game cabinet, causing Jerry to quip, "Game over".
Peterman calls Elaine into his office and shows her surveillance videotape of her eating and "dancing" with the slice of cake. He is convinced that the effect of such a "vintage" cake on her digestive system will be all the punishment she needs and dismisses her from the room.
The "Frogger" arcade game.
The sound effects during George's moving of the machine are actual sounds from "Frogger", played in time with his movements. The sound that plays shortly after the machine is smashed by a truck is the "squash" sound when the frog is hit by a vehicle during the game. On September 24, 2005, The Twin Galaxies Intergalactic Scoreboard issued a colorful poster that offered a $1,000 cash prize to the first video game player who could break George Costanza's fictional "Frogger" high score of 860,630 points as portrayed in "The Frogger". No player was able to break this mark before the December 31, 2005, deadline.
On December 22, 2009, Pat Laffaye of Westport, Connecticut, United States, scored a "Frogger" world record high score of 896,980 points. His score was beaten by Michael Smith, who scored 970,440 points on July 15, 2012. Laffaye again retook the "Frogger" world record with a high score of 1,029,990 on August 15, 2017. These are the only three scores that have been verified as having beaten the fictional George Costanza "Seinfeld" score.
Production.
This episode was originally going to be titled "The Cake Parties".
Jason Alexander performed his own stunt in this episode, actually diving out of the path of an oncoming truck and being showered with the shrapnel of the crushed "Frogger" machine as the truck ran it over. He later recounted that two large and heavy pieces of paneling from the side of the game landed uncomfortably close to his head during the shooting of this scene.
Nickelodeon star Drake Bell makes a cameo in this episode as the child who is first seen playing on the "Frogger" machine and loses due to Jerry and George's unsolicited advice.
Most scenes deleted from this episode involved Kramer attracting a new "long distance" girlfriend; this carries over to the next episode "The Maid".