- This article is about the location. For the Series XI episode, see RD: Twentica.
Twentica was so named since it resembled 1920s Prohibition-Era United States of America.
When the boys from the Dwarf became trapped here, they were able to infiltrate the science-savvy underground (including meeting a drunken, homeless Albert Einstein, and the Lady Be Good Club filled with secret scientists - the Resistance Bunnies - instead of gangsters) and set things right before returning to Red Dwarf in their own time. (Twentica, Series XI)
- to be completed