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Abby Mills: The Good Girl
Played by: Elaine Cassidy
The Sheriff's daughter, Abby's mother was murdered by John Wakefield in the 2001 massacre. Her father sank into a deep depression after this and sent Abby to live with her grandmother in L.A. Seven years later, she returns to Harper's Island to celebrate her best friend Henry's wedding. She is the central motivation for the Wakefield-Dunn killings. Henry betrays his father and mentor in order to fulfill a Childhood Marriage Promise made years before. Did we mention Abby is Henry's half-sister? Well, she is. Abby survives the massacre.
Henry Dunn: The Groom
Played by: Christopher GorhamThe lucky groom. Henry used to summer on Harper's Island with his family. It was there that he met his future fiancee, Trish Wellington...when cleaning her father's boat. Henry is best friends with Abby, and has beens since they were little. Henry is the son of John Wakefield, and the murderer out of the 25 characters. He is killed by Abby in Episode 13.
Trish Wellington: The Bride
Played by: Katie CassidyThe bride of the wedding. She's completely devoted to Henry and proves to be pretty competent when events take a turn for the worse. In Episode 12, she's killed by Henry after he reveals himself as (one of) the killer(s).
Sheriff Charlie Mills: The Sheriff
Played By: Jim Beaver
Thomas Wellington: The Father of the Bride
Played by: Richard BurgiTrish's father, and the CEO of a major commercial real estate firm. He is a self-made man, and the ultimate Determinator, completely committed to getting what he wants, including stopping his youngest daughter's wedding. He is killed with a head spade booby trap during the wedding rehearsal in Episode 5. His death is a major turning point in the series, and officially closes off the 'happy and carefree' part of the show.
Played by: Victor WebsterTrish's ex-boyfriend from college who, was apparently scared off by Henry after the couple broke up. However, Daddy Wellington is paying him to come back to the island in order to break up the relationship between Henry and Trish. He finally gives up and is paid an extra fee by Mr. Wellington to leave the island... and is killed by a rigged shotgun planted in his boat.
Played by: Dean ChekvalaHenry's unstable younger brother.
Christopher "Sully" Sullivan
Played by: Matt BarrThe best friend of Henry Dunn, and best man at his wedding. He is fatally stabbed by Henry, and officially the last of the wedding guests to die
Played by: Harry Hamlin
Played by: Callum Keith Rennie