For £20, Travelzoo subscribers can book a ticket worth £55 to the limited run of a hit West End show described by The Sunday Times as "glorious, irresistible silliness".
Written by Eric Idle, this hilarious version of "Monty Python's Spamalot" is shorter and sharper than the original, but still includes favourites such as "Always Look on the Bright Side of Life", the classic song recently performed at the closing ceremony of the London 2012 Olympic Games.
Stage and screen legend Bonnie Langford returns to the role of Lady of the Lake, alongside comedians Jon Culshaw and Marcus Brigstocke** alternating in the role of King Arthur, with former "EastEnders" star Todd Carty on coconuts as Patsy.
"Spamalot" is playing at the Harold Pinter Theatre until 9 September, and this offer is valid for all performances except Saturday evenings. £20 will get you a Price Band A ticket in the Stalls or Dress Circle, and the only extra to pay is a per-transaction fee of £3.
Book by 9 September.