What's On at the Adelphi Theatre Back to the Future: The Musical Fri 14 May 2021 - Sun 26 September 2021 Adelphi Theatre More info Book Tickets Seven Drunken Nights Tuesday 19 October 2021 Adelphi Theatre More info Book Tickets Some Guys Have All The Luck Tuesday 9 November 2021 Adelphi Theatre More info Book Tickets Katherine Jenkins Tue 30 November 2021 Adelphi Theatre More info Book Tickets Whitney - Queen of The Night Tue 7 December 2021 Adelphi Theatre More info Book Tickets