- Acting for Two:
- For the TV special, June Foray plays the schoolteacher, Karen, as well as her friends. Meanwhile, Paul Frees plays the traffic cop, the ticket man at the station, and Santa Claus.
- In Frosty's Winter Wonderland, in addition to reprising his role as the traffic cop, Paul Frees voices Jack Frost. Parson Brown and his snowman counterpart are both played by Dennis Day.
- All-Star Cast: Frosty Returns is chock full of big names, including John Goodman, Jonathan Winters, Brian Doyle-Murray, Andrea Martin, Jan Hooks, and a then-unknown Elisabeth Moss.
- Digital Destruction: Recent airings of Frosty Returns for some reason remove Jonathan Winters' character from certain shots, and the snowfall is digitally erased in various scenes. The video releases retain the snowfall and character. Plus, there are two different versions of the ending credits; the TV version matches more to the traditional 1980s/90s Peanuts-style credit scroll. The 2014 video release also adds two commercial fade-ins where there weren't any before.
- Fan Nickname: the children (Karen, Holly, Tommy and Sarah) who help Frosty are known as "snow angels".
- The Other Marty: Karen was voiced by June Foray in the original airing; later and most current versions have another, uncredited actress, whose voice stands out due to have a much. Due to the credits still crediting June Foray as doing Karen's voice, her replacement went unidentified, until Mark Evanier's DVD Commentary for the 2018 Deluxe Edition DVD and Blu-ray referred to the girl as Suzanne Davidson. Interestingly enough, certain bits of Foray's performance are left in the redub besides her singing: The first sneeze in the boxcar, another sneeze while in the woods, Karen crying over the Frosty puddle, and the little yelp she gives out when running into Frosty's arms while on her rooftop.
- Keep Circulating the Tapes: The original version where Karen bore the voice of June Foray. Australian voice actor and historian Keith Scott claims to own an old record containing Foray's original dialogue, though it's unknown if he still has it. Also this video notes the differences between a VHS tape and a Blu-ray - the uploader didn't know it at the time, but this scene is in fact taken from the Foray version, which was apparently remastered by accident. Finally averted in December 2016, when a reconstruction of the original cut was uploaded to YouTube, using Rhino's audio CD as a source.
- Throw It In!: During the second reprise of "Let There Be Snow" in Frosty Returns, Charles sings twice, and in each instance, he does so wildly off-key. Holly and Frosty visibly cringe when he does. It's most likely the animation came after the voice recording, so it's possible their reaction wasn't in the original storyboard, but was thrown in for a laugh.
Trivia / Frosty the Snowman