In 1987, Singh taught science at The Doon School, an independent all-boys' boarding school in India. In 1990 Singh returned to England and joined the BBC's Science and Features Department, where he was a producer and director working on programmes such as "Tomorrow's World" and "Horizon". Singh was introduced to Richard Wiseman through their collaboration on "Tomorrow's World". At Wiseman's suggestion, Singh directed a segment about politicians lying in different mediums, and getting the public's opinion on whether the person was lying or not.