as well as from Century 21's earlier series (particularly Captain Scarlet and Joe 90). The final recording session was held on 10 January 1969. In 2007, Fanderson released the series' soundtrack on CD exclusively for its members. In 2022, Silva Screen released it on CD for the public. Cancellation Lew Grade, the ITC Entertainment financier, ordered Anderson to cancel production on The Secret Service during a test screening of the pilot episode, "A Case for the Bishop", in December 1968. Objecting to the concept on the grounds that audiences in the United States would be confused by the Unwinese, Grade capped the production at the thirteen episodes that either had been completed or were in production at the time of the screening. Anderson countered that a nonsense language such as Unwinese is inherently incomprehensible, and questioned Grade's reasoning for the cancellation, responding that "I chose Stanley Unwin because you are not supposed to understand Stanley Unwin, even if you're British. I thought if the Americans don't understand him either, what's the difference?" However, Anderson conceded that Grade "was not a man you could argue with. If he said "No", you had to accept that he wouldn't change his mind." Of Grade's decision, La Rivière conjectures, "No one knows what was running through [his] mind ... but given the ease with which the 'Unwinese' element could have been removed [from] the series, it seems probable that he simply didn't like a lot of what he was seeing." In a move that would lead to the discontinuation of the Supermarionation format, Anderson and Grade coordinated to transfer most of the production staff from the Century 21 base at the Slough Trading Estate to Pinewood Studios to start filming on UFO, the Andersons' first full live-action series. Having wanted to abandon puppet work and move into live-action, Anderson greeted the cancellation of The Secret Service with optimism, remarking of live actors, "I started to think: 'It's amazing! They speak! Their mouths are in synch with their words! And they can walk! And they can pick up things!'" After the Century 21 Studios closed down on 24 January 1969 on completion of the final episode of The Secret Service, "More Haste Less Speed", the special effects department expanded its workshops into the disused rooms in anticipation of new projects for UFO. Broadcast and reception The Secret Service had a very limited distribution compared to