query: How many episodes of the British TV show UFO were there?
passage: UFO (TV series)
A single season of 26 episodes (including the pilot) was filmed over the course of more than a year; a five-month production break was caused by the closure of MGM-British Studios in Borehamwood, where the show was initially made. Production then moved to Pinewood Studios in Buckinghamshire. UFO was first broadcast in the UK and Canada in 1970, and in US syndication over the next two years.
passage: Survival in the Sky
Survival in the Sky (United States title, known as Black Box in the United Kingdom) is a British series of six one-hour episodes produced by Darlow Smithson Productions for The Learning Channel and Channel 4. Narrated by Will Lyman (US) or Sean Barrett (UK), the series primarily concentrated on commercial aviation accidents and the investigations related to them. They were first aired as a series of only four episodes in late 1996. Two additional episodes were produced and premiered in 1998.