The Apprentice

The Apprentice was a television show hosted by Alan Sugar, and his assistants Nick Hewer and Karren Brady, on which he challenged contestants to sell as many Shakri cubes as possible within 24 hours. Craig made a "right hash of it", and was swiftly fired. (TV: The Power of Three)

Ianto Jones was a fan of the series. (AUDIO: The Office of Never Was)

Behind the scenes
Helicopter footage of Canary Wharf was taken from The Apprentice and used in Army of Ghosts upon revealing the true location of Torchwood Tower.