Pickens

 was a friend of Thomas Brewster who assisted him in his robberies of scientific paraphernalia in London, 1867. Together, they stole the electromagnetic field generator from the Fifth Doctor while he resided at 107 Baker Street. They lived together in a storage area in the London Underground near Great Portland Street station. He told Nyssa in regards to Brewster, "I like him. More than he likes me, if you know what I mean." He died trying to save him from the creatures from an alternate 2008.