Cowboy Bebop - Season 1 Episode 11 -

When Jet gets swindled by Faye, he loses all of his clothes, so he goes to the storage bay to get a blanket. While there, he gets bitten by an unknown creature, though he didn’t get a good look at what it was. Spike and Faye dismiss it as a rat, though they soon discover that the scenario is much more serious than they realized, as one by one they fall victim by the creature until only Spike is left to deal with the problem.