The show is based around making audience members' wishes come true, featuring ordinary people living out their fantasies for real.
There are no rules as to who can appear on the show; it features ordinary members of the public nominated by friends who think they have a hidden talent or other special reason. Every guest has the help of Barrowman and other celebrity guests.
The studio audience are also involved in the show, as John surprises unsuspecting members of the public, making their wishes come true on the night even if they hadn't signed up for the show.
A short Doctor Who sketch aired as part of the 23 May 2009 episode. It featured John Barrowman reprising his role as Jack Harkness, David Tennant as himself, and competition winner Tim Ingham as alien Sao Til.[4][5] In the short, set on the TARDIS, Barrowman and Ingham alternate between playing their characters and playing themselves as actors on the TARDIS set.