Peter and Lucy make a surprise cameo in Intergalactic Thanksgiving (or Please Don’t Eat the Planet).

Intergalactic Thanksgiving Title Card
Please Don't Eat the Planet title card.

Peter and Lucy make a ‘blink-and-you’ll-miss-it’ cameo in Nelvana’s fourth special from 1979, Intergalactic Thanksgiving (or Please Don’t Eat The Planet).

They’re part of the caravan of spaceships travelling to the planet Laffalot.

Animated gif of the scene featuring Peter and Lucy.

No doubt an in-joke for the folks at Nelvana, possibly even a wink and a nod to the idea that Viacom wanted to make a series out of A Cosmic Christmas.