Blooper: In some copies of the movie, the scene of the green-skinned government agent standing in the doorway plays for about a second before the end credits.
Keep Circulating the Tapes: Fell victim to this when Family Home Entertainment owned home video rights to the 1964-'70Rankin/Bass specials, since they never released Cricket on the Hearth on VHS or Laserdisc. It ended up not receiving a home video release until the late '90s, after the rights to those specials shifted to Golden Books Family Entertainment, now owned by Universal.