- Billy West (Philip J. Fry / Professor Farnsworth / Zoidberg / Zapp Brannigan (voice))
- Katey Sagal (Leela (voice))
- John DiMaggio (Bender (voice))
- Tress MacNeille (Mom (voice))
- Maurice LaMarche (Morbo / Kif Kroker (voice))
- Lauren Tom (Amy Wong (voice))
- Phil LaMarr (Hermes Conrad (voice))
- David Herman (Scruffy (voice))
Futurama — S6E23
Episode: The Tip of the Zoidberg
Air Date: 2011-08-18
Runtime: 22 min
Overview
The crew uncovers a dark secret concerning a covert mission undertaken by the Professor and Dr. Zoidberg many years earlier.