Mystery Science Theater 3000 (1989)

Season 6: Episode 3

In the short "The Selling Wizard" (1954), an unseen narrator and a mute 'Pizza Dominatrix' explain the benefits of freezer cases to grocery store owners. In "The Dead Talk Back" (1957), a crackpot 'scientist' invents the machine that can supposedly communicate with the dead and uses it to help solve a murder. On the SOL, Servo and crow host "The Dead Talk Back" radio show, the crew dresses as the Grateful Dead, and the crew is interrogated by Dr. Forrester, but he is interrupted when Frank confesses.