Main
Alex Hassell as Rupert Campbell-Black, a retired Olympian show jumper, notorious womaniser, and a Tory MP and sports minister. Despite his outward charm and facility with people, he lives a lonely life with his many dogs. Rupert joins Venturer with Declan and Freddie and develops feelings for Agatha (Taggie). In series 2, he retires as an MP and minister, and is in a relationship with Cameron, further complicating his feelings for Taggie.
Nafessa Williams as Cameron Cook, an American TV producer from New York who works for Corinium and has an affair with Tony during series 1. In series 2, she is in a relationship with Rupert.
Emily Atack as Sarah Stratton, the second wife and former mistress of Conservative MP Paul Stratton, with aspirations of being a television presenter.
Catriona Chandler as Caitlin O'Hara, Declan and Maud's youngest child who is attending boarding school.
Oliver Chris as James Vereker, a TV host and actor at Corinium and Lizzie's self-absorbed husband.
Danny Dyer as Freddie Jones, a self-made successful electronics businessman and resident in Rutshire in a loveless marriage. He is attracted to Lizzie.
Rufus Jones as Paul Stratton, a Conservative MP going through a mid-life crisis who is embroiled in an adultery scandal at the beginning of the series.
Bella Maclean as Agatha "Taggie" O'Hara, Declan and Maud's overlooked middle child with aspirations of opening her own catering company. She has several poor first impressions of Rupert, but gradually develops a crush on him as they spend more time together.
Lisa McGrillis as Valerie Jones, Freddie's wife, a notorious social climber who runs a clothing boutique in town. She is often mocked for her bourgeois lack of taste.
Katherine Parkinson as Lizzie Vereker, a romance author and resident of Rutshire who is good friends with Rupert. She is neglected by her narcissistic husband and is used to his affairs and lack of attention. She gradually develops a romantic connection with Freddie.
Luke Pasqualino as Basil "Bas" Baddingham, Tony's younger and promiscuous half-brother who owns the local pub.
Claire Rushbrook as Monica, Lady Baddingham, Tony's wife, an introvert generally uninvested in her husband's business.
Annabel Scholey as Beattie Johnson, a journalist who is in a relationship with Rupert at the beginning of the series.
Victoria Smurfit as Maud O'Hara, Declan's wife, an actress whose marriage is recovering from an affair she had prior to the series, and is known to be flirtatious with other men. She is neglected by her workaholic husband. Tony hires her in series 2.
Aidan Turner as Declan O'Hara, a temperamental Irish former BBC journalist who is recruited by Corinium to host his own show at the beginning of the series. After seeing Tony's true colours, he leaves Corinium to start his own company, Venturer. He initially has a hostile relationship with Rupert, but the two gradually become friends and trusted colleagues.
David Tennant as Tony, Lord Baddingham, the ruthless managing director of Corinium Television. He has an affair with Cameron during series 1. He attempts to instrumentalize Declan in his war against Rupert.
Gary Lamont as Charles Fairburn (series 2, supporting series 1), the controller of programmes at Corinium who has a secret romance with Gerald.
Hubert Burton as Gerald Middleton (series 2, supporting series 1), Rupert's personal aide. In series 2, he takes Rupert's former seat as a Conservative MP.
Gabriel Tierney as Patrick O'Hara (series 2, supporting series 1), Declan and Maud's eldest child who harbours feelings for Cameron. He is a young idealist.
Anastasia Griffith (series 1, supporting) and Hayley Atwell (series 2) as Helen Gordon, Rupert's ex-wife and mother of his two children.
Rupert Everett as Malise Gordon (series 2), Helen's husband and Rupert's former showjumping coach.
Jonny Weldon as Mike Maples (series 2)
Bryony Hannah as Deirdre Kilpatrick (series 2, supporting series 1), an assistant to James Vereker at Corinium.
Louis Landau as Archie Baddingham (series 2, supporting series 1), Tony and Monica's teenage son.
Dan Tetsell as Steve Meadows (series 2, supporting series 1)