Three's Company (1977)

Season 3: Episode 13

Eleanor makes her first appearance in the shower when Jack meets her for the first time. Knowing that Eleanor was Janet and Chrissy's old roommate, he thinks that Eleanor is moving back in and he might have to leave. What he doesn't know is that they are planning a surprise party for him, but it's too late when Jack tries to ruin the party by having Larry streak across the room!