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Book tickets for Speculations, the gripping new political thriller from Torben Betts (Murder in the Dark) at Marylebone Theatre.

Speculations in London

Coming to Marylebone Theatre this October is the world premiere of Speculations, a gripping new political thriller by Torben Betts (Murder in the Dark), directed by multi-award-winning, legendary theatre and film director Trevor Nunn.

Olivier Award-winner Janie Dee (The Truth, Carousel) stars as one of America’s most celebrated journalists, Dorothy Kilgallen, who sets out on a mission to discover the truth behind three of the most infamous deaths of the 20th century.

Speculations runs at Marylebone Theatre from 30 October 2026 until 3 January 2027.

Book Speculations tickets

Book your tickets now so you don’t miss this this strictly limited 9-week run.

New York, 1965. Celebrated journalist and television star Dorothy Kilgallen is on the trail of the biggest story of her career. Three years earlier, Marilyn Monroe was found dead in Los Angeles. A year after that, President Kennedy was assassinated in Dallas. Then his suspected killer, Lee Harvey Oswald, was himself shot dead, live on television. America’s questions were answered. Dorothy was not convinced.

Following a trail from Hollywood to the White House, from the Kennedy dynasty to the New Orleans underworld, Dorothy begins to see connections others have missed, connections involving Robert Kennedy, Jack Ruby, organised crime boss Carlos Marcello, Marilyn Monroe, Oswald and JFK. Blending Hollywood glamour, political intrigue and true-crime mystery, Speculations plunges into the shadows behind some of the twentieth century’s most infamous deaths, and asks a tantalising question: how far would you go for the truth?

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Stars and Creatives

Who is in the cast of Speculations ?

  • Dorothy Kilgallen: Janie Dee

Further casting to be announced at a later date

Who are the creative team of Speculations ?

  • Writer: Torben Betts
  • Director: Sir Trevor Nunn
  • Designer: Lee Newby
  • Lighting Designer: Johanna Town
  • Sound Designer: Gregory Clarke

Venue Information

Marylebone Theatre , Rudolf Steiner House, 35 Park Road , London, NW1 6XT

Nearest Tube or Train: Baker Street (underground), London Marylebone (train)

Nearest Buses: 13, 113, 139, 189, 274, N113

Directions

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Frequently Asked Questions

Speculations is playing at the Marylebone Theatre in London
Yes, Speculations has matinee performances on the following days:
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