Snoopy Come Home (1972)

Continuity mistake: When Snoopy and Woodstock lie down after finishing their meal at the camp, you can see there is still food on both their plates, but in the next shot the food has disappeared.

Charlie Brown: If I don't find out what happened to Snoop, I think I'll go out of my mind.
Linus: If you'll calm down for a minute, Charlie Brown, I may able to conduct a little private investigation.
Charlie Brown: Just what I need, a blanket-carrying Sherlock Holmes.

Trivia: This film marked the on-screen debut of Woodstock.