The song written by Neil Innes that appears in the credits, "When Does A Dream Begin?", is used as background music at the start of the "Up Your Pavement" sketch.
This is episode #42 of Monty Python's Flying Circus, featuring writer Douglas Adams in an onscreen role. 42 would become an integral part in Adams's The Hitchhiker's Guide To The Galaxy later on.
The DVD title for this episode is "LE War".