Derren Brown
Around the 2010s, when UNIT brought the Doctor's TARDIS to Trafalgar Square in a helicopter, they decided to attribute the event to Derren Brown as their cover story. It was not the first time they had done so. (TV: The Day of the Doctor)
When the Eleventh Doctor was being psychically probed, he wondered if it was Derren Brown again. (PROSE: Dead of Winter)
In 2009, Clyde Langer told Rani Chandra that aliens had "more tricks up their sleeve than Derren Brown". (PROSE: Day of the Clown)
In 2016, when Tanya Adeola was partially invisible due to bone spiders' spiderweb, Miss Quill suggested that they "get Derren Brown on the phone". (PROSE: The Stone House)