"The Stand-In" is probably my least favorite episode in season 5 of Seinfeld. Although, being a Seinfeld season 5 episode, it still has its moments of hilarity.
The episode features the four leads in four separate story lines that don't interact in any meaningful way. What's worse, is that none of them have any truly satisfying or funny conclusions. In fact, they're all very mean-spirited, reminding me more of the spirits of seasons 8 and 9.
The only actor who pulls a Season 5-worthy performance here is Jason Alexander. George's story starts out great and drags out towards the ending, but it has some hilarious moments thanks mainly to Jason's body language. Elaine's and Jerry's stories are completely nonsensical, and though Julia is quite funny in the episode's most iconic scene, it's still not enough. Kramer is, strangely, almost passive in this episode. He only serves as a foil to Mickey - who appears in the series for the first time, and serves as the only really memorable thing about it.