The fifth series, which began in April 1987, saw a number of changes to the format. The group filmed sketches on location in addition to the studio-based material. A new studio set, built in 1986 for an hour-long special, made a full time appearance and the group's self-performed theme song "We Are the Grumbleweeds" was replaced with a big band version. The Sutcliffe brothers decided to leave the group in 1987, with their places taken by backing musicians for the final few television shows. The final programme was transmitted on 9 July 1988.