When the Mysterons bizarrely threaten to "kill time", Colonel White sends the Spectrum captains to major cities to watch for potential targets. No promising intelligence surfaces until Captain Magenta discovers that the Commander of Western Region World Defence, General J.F. Tiempo – whose surname means "time" in Spanish – is at a clinic in England to undergo neurosurgery. Believing that Tiempo's life is in danger, White has him flown to Cloudbase with his surgeon, Dr Magnus, who insists that the operation – to be carried out with the aid of a pioneering medical device called the "cerebral pulsator" – go ahead as planned. White reluctantly agrees and allows him to use their sickbay as an operating theatre, with Cloudbase's medical officer Dr Fawn assisting Magnus and his subordinates.

Unknown to Spectrum, Magnus is a Mysteron reconstruction of the original doctor, who has been killed in a road accident engineered by Captain Black. During the operation, the reconstruction deliberately overruns the pulsator, inducing a seizure that kills his masked patient. Fawn removes the mask to reveal the face of Captain Scarlet, who unknown to Magnus had substituted for Tiempo. Exposed as a Mysteron agent, Magnus breaks out of the sickbay and flees to Cloudbase's generator room. He is cornered by Captain Blue and killed when he is knocked against a bare cable.

During this time, an abnormality has appeared on one of pre-operative radiographs taken of Tiempo's head: Magnus' hand, which was accidentally caught in the image, has blocked the X-rays and is registering as solid flesh. With Tiempo saved and Scarlet revived thanks to his retro-metabolic powers, White announces that Spectrum will develop technology to exploit the Mysterons' imperviousness to X-rays and vulnerability to electricity.

• Ed Bishop as Captain Blue
• Gary Files as Captain Magenta
• Donald Gray as Colonel White, Captain Black and the Mysterons
• Francis Matthews as Captain Scarlet
• Charles Tingwell as Dr Fawn

Writers Richard Conway and Stephen J. Mattick named Magnus's colleague, Dr Turner, after the episode's director, Ken Turner. In the script, Conway and Mattick suggested that Wexham Park Hospital could be used as a location to shoot footage showing the development of Tiempo's radiographs. In the end, however, the episode was filmed entirely at Century 21's studios on the Slough Trading Estate.^[2]

Filming began on 20 February 1967 and was completed in two weeks.^[3] One of the medical students that appear in the opening scene was played by a puppet that was originally sculpted as the prototype of Captain Scarlet.^[4] The episode's incidental music was recorded in a four-and-a-half-hour studio session held on 14 May 1967, where it was performed by a group of 12 instrumentalists conducted by series composer Barry Gray. The music for "Renegade Rocket" was recorded during the same session.^[5]

"Operation Time" features voice actor Gary Files' first contributions to Captain Scarlet. Files was unavailable during the production of the series' earlier episodes because he was voicing characters in the film Thunderbird 6, for which he had been cast as a "try-out" for Captain Scarlet.^[6]

Andrew Pixley and Julie Rogers of Starburst magazine note the "cryptic" nature of the Mysterons' threat to "kill time", humorously remarking that it could "[suggest] they'll be passing a few hours playing cards or watching Oprah." They also consider the "rather graphic" electrocution of the reconstructed Magnus to be one of the series' more violent moments.^[7]

Noting that the episode "expands on the mythology of the Mysterons", writer Fred McNamara credits "Operation Time" for its "precise delivery [...] pushing the world of Captain Scarlet to new levels whilst also acting as a confident episode in its own right, with a clear beginning and end." He criticises some elements of the story, calling Captain Magenta's solving of the Mysteron riddle "as frustrating as it is hilarious" given that while other Spectrum captains have been posted to major cities to scout for threats, Magenta makes the connection to Tiempo from a mere newspaper on Cloudbase. McNamara also expresses dissatisfaction with the fact that nothing of the other captains' assignments is shown, a move he states was "probably due to the limited running time" and the constraints of the "TV format". In the episode's favour, McNamara praises the characterisation of Captain Black and Dr Magnus, describing the former as "deliciously evil" while hunting down the original Magnus and believing the latter to be unusually well developed for a Mysteron victim. He also commends Ken Turner's direction, calling the car chase "fantastically executed in terms of pace and its visuals" and noting that the regular use of close-ups gives the episode a "claustrophic" feel.^[8]

Works cited edit

• Bentley, Chris (2017). Hearn, Marcus (ed.). Captain Scarlet and the Mysterons: The Vault. Cambridge, UK: Signum Books. ISBN 978-0-995519-12-1.

• "Operation Time" at IMDb  
• "Operation Time" at TheVervoid.com