* {{Blooper}}: Santa's sleigh is supposed to have eight reindeer pulling it (Dasher, Dancer, etc.), which would make nine total when Rudolph is with them. But when we see the sleigh being pulled at the end, including Rudolph, there are only seven. [[WordOfGod The producers said]] they didn't have the budget to make nine reindeer.
* ChannelHop: Creator/{{NBC}} held the broadcast rights to the special until 1972, when they were snapped up by Creator/{{CBS}}, where it has remained ever since. However, with the acquisition of [[Creator/DreamWorksAnimation [=DreamWorks=] Classics]] (the special's current rightsholder) by NBC's parent company, [=NBCUniversal=], in 2016, the special could return to NBC once again when CBS's rights expire.
* CrossDressingVoices:
** The title character was voiced by Billie Mae Richards, who was credited as Billy Richards from 1965 onward, as mentioned in obituaries mourning her death in September 2010. Kathleen Barr later played the character.
** Averted in the Mexican Spanish dub of the 1964 special, where he was voiced by Creator/JesusBarrero.
* RefittedForSequel: Some time after Rankin/Bass replaced "We're a Couple of Misfits" with "Fame and Fortune", and before they put it back, they used "Misfits" in 1979's ''WesternAnimation/RudolphAndFrostysChristmasInJuly'', as a duet between Rudolph and WesternAnimation/FrostyTheSnowman.
* WhatCouldHaveBeen:
** Early drafts included a DeliveryStork, but when the idea of a CelebrityVoiceActor (Burl Ives) as the narrator was introduced, the stork was cut for time.
** Yukon Cornelius was originally going to sing "Silver and Gold" instead of Burl Ives.
* WordOfGod: Many wondered what made the female doll a misfit. It was revealed decades later in a talk show, when Arthur Rankin, Jr. said her problem was psychological, from feeling unloved. Jules Bass was quoted as saying, "I dunno. [[CrowningMomentOfFunny Maybe she was an alcoholic or something?]]"
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