Crystal Tipps and Alistair films for the Central Office of Information. The series has no dialogue but rather is accompanied by a full musical soundtrack composed by Paul Reade; however, when shown on "Captain Kangaroo" in the U.S. in the 1970s the series did have voice-over narration by Cosmo "Gus" Allegretti in his high-pitched "Mister Moose" voice. Crystal's Christmas Special was shown on 25 December 1974. Crystal Tipps and Alistair Crystal Tipps and Alistair is a British cartoon produced for the BBC. The title characters are a girl and her dog who are joined by their friends Birdie and Butterfly. There are 50 five-minute
Companion (Doctor Who) in a companion role and excludes minor roles, cameos, flashbacks, and so forth. Also, the table refers solely to adventures with the respective Doctor. Some companions who appear with two or more Doctors appear in separate tables. The following three characters, all associated with UNIT during the Third Doctor's exile to Earth, are sometimes considered his companions despite appearing irregularly during his tenure. A few of the companions have died during the course of the series. Katarina sacrificed herself by opening her airlock to save the others from the mad fugitive Kirksen, and was blown into the vacuum of space.