Life Is a Circus, Charlie Brown (1980 TV Movie)
Polly: Hugo! Fifi! Come back! Hugo the Great! Fifi! Come back!
Charlie Brown: [watching as the circus train pulls away with Snoopy] Good grief. He's gone. Dognapped.
Charlie Brown: [to Lucy, who has taken it upon herself to board up Snoopy's doghouse] What are you doing?
Lucy van Pelt: Since Snoopy 'obviously' isn't coming back, we're closing down his house.
Charlie Brown: [as she walks away] What do you mean he's not coming back?