Mark’s extensive TV and film credits include Red Dwarf, as Howard Rimmer, Doctor Who and Transformers.
He played former Prime Minister David Cameron in Channel 4 film Coalition and he will soon be appearing throughout season three of The Crown on Netflix.
Event co-organiser Steve Dickinson said: “Mark has an impressive CV so when he contacted us to see if we could fit him in we jumped at the chance, his portrayal of Howard Rimmer is hilarious, he’s such a nice guy, a great final guest for the event."
Confirmed guests are….
Chris Rankin - Percy Weasley - Harry Potter
Hugo Myatt - Treguard - Knightmare
Ross O’Hennessy - The Lord of Bones - Game of Thrones (Sat only)
Andrew Lee Potts - Primeval - Lucky Man - The Crown
Willie Coppen - Ewok - Return of the Jedi
Hattie Hayridge - Holly - Red Dwarf
Caroline Blakiston - Mon Mothma - Return of the Jedi
Mark Dexter - Howard Rimmer - Red Dwarf
For tickets visit www.scifiscarborough.co.uk or the venue www.scarboroughspa.co.uk or in person from the venue box office or Mojo’s Music Café on Victoria Rd, Scarborough with no booking fees.
Tickets will also be available on the weekend at the event box office.