Daniel Gillies as Robert Durst

Katharine McPhee as Kathleen “Kathie” McCormack

John Glover as Seymour Durst

Fiona Vroom as Eleanor Schwank

Ryan Robbins as Jim

Jesse Hutch as Henry Luttman

Martin Donovan as Detective Struk

Blair Penner as Douglas Durst

Kwesi Ameyaw as Edward Michaels

Ella Cannon as Mary McCormack

Kyla Wise as Gabrielle Colquitt

Aidan Kahn as Marcel

Jason Schombing as Joe Becerra

Michael Dickson as Professor

Bree Woodill as Ellen Strauss

Frances Flanagan as Ann McCormack

Iris Paluly as Susan Berman

Grace Wan as Pedestrian

Graeme Duffy as Nick Scoppetta

Kurt Teixeira as Mark Bowen

Ash Lee as Lieutenant Robert Gibbons

Nailya Red as Prudence Farrow

Jessica Smith as Gilberte Najamy

Ragnarok Watson as Norwegian Elkhound

Gerry South as Tim Martin

Adam Kozlick as Clerk

Chilko Tivy as Robin Hill

Vaughan Winmill as Bar Tender

Leandro Guedes as Patient

Sarah Carson as Sharon McCormack