distinctive whistles made by the Clangers, performed on swanee whistles, have become as identifiable as the characters themselves, much imitated by viewers. The series creators have said that the Clangers, living in vacuum, did not communicate by sound, but rather by a type of nuclear magnetic resonance, which was translated to audible whistles for the human audience. These whistles followed the rhythm and intonation of a script in English. The action was also narrated by a voice-over from Postgate. However, when the series was shown without narration to a group of overseas students, many of them felt that the Clangers were speaking their particular language. Postgate recounted: "When the BBC got the script, [they] rang me up and said "At the beginning of episode three, where the doors get stuck, Major Clanger says 'sod it, the bloody thing’s stuck again'. Well, darling, you can't say that on children's television, you know, I mean you just can't". I said "It's not going to be said, it's going to be whistled", but [they] just said "But people will know!" I said no, that if they had nice minds, they'd think "Oh dear, the silly thing's not working properly". If you watch the episode, the one where the rocket goes up and shoots down the Iron Chicken, Major Clanger kicks the door to make it work and his first words are "Sod it, the bloody thing's stuck again". Years later, when the merchandising took off, the Golden Bear company wanted a Clanger and a Clanger phrase for it to make when you squeezed it, they got "Sod it, the bloody thing’s stuck again"!" John Du Prez, who wrote some of the music for Monty Python (another show Michael Palin was in) composed the score for the 2015 series. Episodes from the original series Series 1 (1969–1970) The first series was transmitted on BBC1 at 5:55pm, except for the episode "Chicken" which went out at 5:50pm because there was a Children in Need appeal at 6:00pm. Series 2 (1971–1972) The second series episodes were also transmitted weekly on BBC1, but in a wide variety of differing timeslots. Episodes 1 and 2 were seen at 4:50pm; episodes 3, 5 and 6 at 5:05pm; episodes 4 and 8 at 5:00pm; episode 7 at 4:40pm; episode 9 at 5:30pm; and episodes 10, 11, 12 and 13 (which followed episode 9 after a gap of more than a