The success of the special led to two sequels "Rudolph's Shiny New Year" (1976) which continued the reindeer's journeys, and the series was made into a trilogy with the feature-length film "Rudolph and Frosty's Christmas in July" (1979), which integrated the "Rudolph" universe into that of Rankin/Bass's adaptation of "Frosty the Snowman" (1969). Being one of the most popular Rankin/Bass characters, Rudolph also made his cameo appearances in two "Animagic" specials "Santa Claus is Comin' to Town" (1970) and "Nestor, the Long–Eared Christmas Donkey" (1977), and in the Easter television special "The First Easter Rabbit" (1976) with cel animation by Toru Hara's Topcraft.