Pigs in Space first appeared on The Muppet Show during the second season. The recurring sketch became a popular part of the series, appearing in 32 episodes over four seasons. During the sketch's first year, Pigs in Space began with an introduction featuring the crew's commanding roster. Each introduction, narrated by Jerry Nelson as the Announcer, used several different humorous adjectives to describe the characters by name. This was dropped starting with the third season.