The incidental music for " Big Ben Strikes Again " was recorded on 16 April 1967 in a four-hour session held at series composer Barry Gray 's private studio , where it was performed by an ensemble of 14 instrumentalists . It includes a light jazz track , " Until Midnight " , which can be heard playing on the transporter radio in the scene leading up to Big Ben 's midnight chimes . Music for the following episode , " Manhunt " , was recorded on the same day . When BBC Two started to repeat '' Captain Scarlet '' in September 2001 , " Big Ben Strikes Again " was originally due to be broadcast as the third episode to match the order of production . However , it was postponed due to similarities between the plot , which focuses on a missing atomic device , and the September 11 attacks that had occurred earlier that month . This coincided with distributor Carlton briefly taking down the '' Captain Scarlet '' pages on its website . The episode was ultimately broadcast several weeks after its intended transmission date
September 11 attacks
September 11 attacks
Big Ben Strikes Again