|Let Sleeping-Over Dogs Lie|
|U.S. Air Date||October 28, 2000|
|Directed by||Timothy Björklund|
|Written by||Bill & Cheri Steinkellner|
|Previous||Being Mrs. Leadready|
|Next||Costume Pity Party|
Ian's birthday party will be Scott and Leonard's first sleepover ever, and they are scared of spending the night at someone else's house, especially Ian's. But as the night goes on, not only do they both have a good time, Ian proves that he isn't as dumb and disgusting as everyone thinks.
|Nathan Lane||Scott Leadready II|
|Shaun Fleming||Leonard Helperman|
|Debra Jo Rupp||Mary Lou Helperman|
|Grey DeLisle||Mrs. Wazselewski|
|Rob Paulsen||Ian Wazselewski|
|Pam Segall||Teddy Naven|
|Cree Summer||Girl in class|
|Fred Willard||Mr. Wazselewski|
Pretty Boy appears with Leonard and Spot in the bedroom, but has no lines.
- Moral: Always try new things.
- This is the first time Mr. Jolly does not appear in an episode.