Zack Snyder gives James Gunn some unsolicited advice about his 'Superman' movie as the two cameo on 'Rick and Morty': 'He's the Man of Steel, not the Man of Conversation.'

Joining a long list of celebrity voices to have appeared on Rick and Morty, Snyder popped up to play himself. But the main guest star in “Ricker Than Fiction” is James Gunn —whose Superman hits theaters later this week,

Rachel Brosnahan and David Corenswet are the best Lois and Clark we've ever had, but the first movie in the DCU is too slight and scattered to feel like the start of something big.