HBO MAXSERIESMOVIESNEW & LAST CHANCESCHEDULEMoreDocumentariesSpecialsSportsPodcastsSIGN INGET HBOMAXHBO MAXSERIESMOVIESNEW & LAST CHANCESCHEDULEMoreDocumentariesSpecialsSportsPodcastsSIGN INGET HBOMAXSIGN INStream all of HBO plus more TV, movies, and Max Originals at no additional cost.SIGN INHBO Max Westworld About Season Season 1Season 2Season 3Theresa Cullen Played by Sidse Babett Knudsen Theresa Cullen prevents Westworld from falling into unscripted chaos as head of Quality Assurance, the department in charge of park standards and safety.