Continuing with our time travel narratives, we discuss Hot Tub Time Machine, with a side of Back to the Future and Groundhog Day. We also discuss The Lathe of Heaven by Ursula K Le Guin, The Butterfly Effect, Primer, The Final Countdown and the latter two Back to the Future movies. 

Mistakes I could use a time machine to correct: A movie about the last mortal person on Earth is incorrectly identified as Mr Roboto, but was actually called Mr Nobody. Groundhog Day was also made in 1993, not the mid-80s. I'm sure there are some other mistakes, alas.