Woo(ウーŪ) is a fictional, yeti-like, supernatural monster from the 1966-1967 television series Ultraman. Although the character itself was an original creation for the show, the name however, was a holdover from an earlier, unproduced concept, about a corporal alien visitor. The unmade concept would ultimately become a fully realized program in 2006's Bio Planet WoO, while the same-named monster of this article would return in other entries of the Ultraman franchise.