Turn Tape Over is one of the goals in Futurama: Worlds of Tomorrow. It is the personal goal of Cartridge Unit, an unlockable character available during the Island of Lost Bots event, Act 1.
Cartridge Unit meets the Professor.
48 30 Who are you? And what are you doing here?
SIDE A: I am a functional cartridge unit who refuses to upgrade his technology. Some of my taped responses include "Your mother", "Be kind, rewind." and--
Oh, yes, Bender said he met you once. But he also said you were just a figment of his imagination! Are you even real?
SIDE B: "Given that you're talking to me, I don't see how it matters."
Leela, please help me! I was just talking to Cartridge Unit, that obsolete robot Bender told us about awhile ago.
But Bender said Cartridge Unit never really existed! Am I losing my mind?
I don't think so. I mean, you're talking to me, and I don't exist, right?
...Too many drugs, Hubert. Too many drugs.
Cartridge Unit experiences a snag.
64 40 Hey, Cartridge Unit, you made it out of my imagination and into New New York!
SIDE A: "It's a pleasure to be here."
So here you are in the big city. What exciting thing do you wanna do first?
Turn tape over.
Anyone ever tell you you have a one-track mind?
SIDE A: "Sorry for the inconvenience."
And I'm sorry one of your tapes got ruined.
What's it feel like losing 10% of your vocabulary?
Take it from me, it's no day in the.