Several mini-episodes were produced. An eight-minute episode aired on 27 December 1982 as part of a show hosted by Frank Muir, "The Funny Side of Christmas", and attracted 7.2 million viewers. A 5-minute spoof BBC documentary was shown on "Breakfast Time" on 24 December 1985, with Del being investigated by a BBC consumer expert. An educational episode named "Licensed to Drill", in which Del, Rodney and Grandad discuss oil drilling, was recorded in 1984 but only shown in schools. A 5-minute 1990–91 Persian Gulf War special (dated 1 December 1990) has Del, Rodney, and Albert convey a message to British troops serving in the conflict. It has never been broadcast commercially, but a copy exists at the Imperial War Museum, London. A showing Del, Rodney and Albert making an appeal for donations was shown on 14 March 1997, with 10.6 million viewers. A Sport Relief special was aired on 21 March 2014.