[1][2] A slightly re-worked version of the sketch appeared on the album Another Monty Python Record, released in the UK on 8 October 1971, and in the United States on 21 August 1972.

[3] The premise for the sketch is a BBC current affairs documentary programme, inexplicably titled Ethel the Frog, retrospectively covering the exploits of the brothers Doug and Dinsdale Piranha.

We learn through the mockumentary that Dinsdale and Doug were born 'on probation' in the slums of London, with their father, Arthur Piranha, employed as a scrap‐metal dealer and TV quizmaster.

Through a series of interviews with their victims, we find out that Dinsdale has a peculiar habit of nailing his foes' heads to the floor, while Doug is reported to be more vicious by assailing his enemies with 'sarcasm' and that "He knew all the tricks, dramatic irony, metaphor, bathos, puns, parody, litotes and... satire".

Another Monty Python Record, released in 1971, features the sketch with a slightly different version, whereas instead of a nuclear attack on the airport, the brothers are said to have napalmed Cheltenham.