David Tennant's 14th Doctor makes an early debut in a short scene released by the BBC, featuring a mysterious encounter with a man linked to the Daleks. This marks Tennant's first major onscreen adventure since "The Day of the Doctor" and Russell T. Davies' first writing credit since 2010. "Doctor Who" returns on November 25 with a series of specials starring Tennant, followed by the debut of the 15th Doctor on Christmas Day.