Lord Arthur Holmwood
Originally from Croydon, Surrey, Dan Stevens studied at Cambridge University and starred in the popular BBC mini-series The Line of Beauty.
Discovered at 16, acting in a school play, Londoner Sophia Myles has appeared previously on Mystery! and Masterpiece Theatre in Miss Marple: Sleeping Murder, Foyle's War and Oliver Twist. She has had roles in the films Art School Confidential, Tristan + Isolde, Underworld, From Hell and Mansfield Park.
Donald Sumpter appeared in the first Masterpiece Theatre production ever, 1971's The First Churchills. His television roles since have included the original Doctor Who, Masterpiece's Bleak House (1986) with Diana Rigg and Denholm Elliot and Mystery!s Poirot. His film roles have ranged from Sunday, Bloody Sunday (1971) to The Curse of the Pink Panther (1983) to The Constant Gardener (2005). He is at work on a David Cronenberg thriller with Viggo Mortensen and Naomi Watts.
Northamptonshire native Marc Warren played Monks in Masterpiece Theatre's Oliver Twist (2000). Other television roles have included Prime Suspect 4: Scent of Darkness, Band of Brothers, State of Play and Doctor Who.
Born on Valentine's Day in 1984, Stephanie Leonides has appeared frequently on British television and in films including MirrorMask as Helena (with Gina McKee as her mother).
Rafe Spall, son of actor Timothy Spall, has appeared on stage, television and in films including Shaun of the Dead, Green Street Hooligans and A Good Year.
Dr. John Seward
Tom Burke attended the Royal Academy of Dramatic Art and has a solid grounding in theatre. His television credits include All the King's Men, The Inspector Lynley Mysteries: In Pursuit of the Proper Sinner, Casanova and Jericho: A Pair of Ragged Claws. He appeared in the feature film, The Libertine.
Abraham Van Helsing
In addition to his signature roles as Poirot on Mystery! and in the Masterpiece Theatre productions Henry VIII (2004), The Way We Live Now (2003) and The Secret Agent (1992), actor David Suchet has appeared in the feature films Live From Baghdad (2002), Pinocchio (2002), Wing Commander (1999), RKO 281 (1999) and A Perfect Murder (1998). His stage performances include a turn as George (opposite Diana Rigg) in Who's Afraid of Virginia Woolf?, which earned him a 1996 London Critics Circle Theatre Award (Drama Theatre) for Best Actor. In 1999, he made his Broadway debut as Salieri in Peter Hall's Amadeus, earning a Tony nomination for his performance.