? Tune in as we mysteriously float back to 1983 on an unseasonably warm Christmas adventure through Mexico on a Saturday morning cartoon that lasted a shorter amount of time than the fad it tried to cash in on.  ****  ? Guest:  Gerry Davila (Totally Rad Christmas, @RadChristmas).  ****  ? Topics & Tangents:  1. The History of Rubik’s Cube.  2. The theme song by pre-Ricky Martin Menudo. 3. Ángela Moya, the voice of the kids’ mother, played a small but grim part in Gleaming the Cube.  4. An ode to the family station wagon.  5. An archived, early-Internet Rubik fan site.  6. Rubik has more powers than Superman.  7. Las Posadas.  8. Date a TV show by adding a CB radio.  9. Rubik ending up in an eagle’s nest reminded me of The Polar Express.  10. Reynoldo’s speed cubing skills compared to the real-life Rubik’s Cube world records in 1983 and today.  ****   ? Retro Commercial Break:  Cap’n O.G. Readmore, 1985.  Cap’n Crunch Cereal: Crunch vs. Taste, 1985.  An Alpha Bits Cereal commercial that’s clearly still trying to ride the Pac-Man wave, but I’m not complaining, 1985.  ****  “Rubik, the Amazing Cube” and “Rubik’s First Christmas” © 1983 Ruby-Spears Enterprises, Inc.  Say hi on Twitter, Instagram, and Facebook.  Full show notes with links at adventcalendar.house.