Again", "Codename Europa" and "Expo 2068". The episode also marks the first appearance of the series' secondary title sequence, in which the Mysterons transmit their latest threat to Spectrum while the green Mysteron "eyes" (or "rings") slide menacingly over members of the regular puppet cast. These shots were recorded during the filming of "Winged Assassin". The episode's incidental music – a suite running to 4 minutes and 38 seconds – was recorded by series composer Barry Gray in a four-hour studio session on 3 April 1967. During his examination by Dr Fawn, the ex-Mysteron Scarlet has a flashback to his murder by the aliens in the previous episode. This sequence omits the blue monochrome effect that was used to indicate the aliens' presence in that episode. Broadcast and reception When the series began a re-run on BBC Two in September 2001, "Winged Assassin" was originally due to be broadcast on 17 September as the second episode, matching the order of production. However, it was postponed due to similarities between the story (featuring a plane hi-jacked by the Mysterons) and the terrorist attacks of earlier that month. Around this time, the Captain Scarlet pages on the website of the series' distributor, Carlton, were briefly taken offline. The episode was ultimately broadcast on 10 December 2001. The British Board of Film Classification certifies the episode U, noting that it contains "some action and mild horror". Critical response "Winged Assassin" is considered one of the best episodes of Captain Scarlet by Anthony Clark of sci-fi-online.com and a series highlight by Mike Fillis of Cult Times and Ultimate DVD magazines. Fillis praises effects director Derek Meddings for working "miniature magic" with the DT-19 scale model. Rick Sanchez of IGN regards the scene in which Scarlet forcibly ejects Blue from the SPV as an example of superior writing. Writer Ian Fryer regards "Winged Assassin" as Captain Scarlets "key episode", stating that no instalment "expresses the horror of the series concept better". He praises the "deadpan" presentation of the original DT-19's destruction as well as the "genuinely thrilling" climax, which he regards as the best of any Captain Scarlet episode. He argues that the Mysteron victory "[establishes] this invisible enemy as a truly formidable opponent" while noting that the episode as a whole "treads a fine line between adult themes and suitability for the young audience". Andrew Thomas of Dreamwatch magazine comments that the shots of