Chuckle Brothers

"The Chuckle Brothers" was a name Gwen Cooper once derisively called Jack Harkness and Ianto Jones. (TW: Children of Earth: Day One)
 * ''Though not stated in the episode, the name almost certainly referred to a pair of real-life British comedians.

Behind the scenes

 * Among the Chuckle Brothers' many comedy stage shows was a Doctor Who spoof entitled Doctor What and the Return of the Garlics.