Single Father is a four-episode 2010 BBC television drama centred on Dave (David Tennant), a photographer attempting to look after his children as a single father after the death of his partner, Rita (Laura Fraser), in a road traffic accident. The series also explores the complicated and growing romance between Dave and Rita's best friend, Sarah (Suranne Jones). The series began airing on BBC One on 10 October 2010 at a 9pm timeslot, with 5 million viewers. Plot Photographer Dave Tiler lives with his partner Rita, their three children, and Rita's older daughter of unknown paternity, Lucy. Dave also has an older daughter named Tanya (who has a son of her own, and works as Dave's assistant) from his first marriage. Rita works at a school with her best friend Sarah, who is unsure about whether to start a family with her partner Matt. The Tilers' lives are thrown into chaos when Rita is hit and killed by a police car; the children try to come to terms with the death of their mother, and Dave struggles to cope with raising them alone. Dave and Sarah share a grief-stricken kiss, and are unsure of their attraction to each other. When Lucy starts a quest to find her real father, the shocking results leading Dave to question the paternity of his and Rita's other children. In anger at Rita's dishonesty in keeping Lucy's paternity and her relationship with the father a secret, and questioning Rita's fidelity, Dave sleeps with Sarah, who is angry and hurt when Dave starts post-coitally ranting about Rita. At the same time he begins to doubt if the three other children are really his. Dave faces growing financial problems, problems with his grief-stricken children, and potentially losing Lucy to her biological father. Meanwhile Matt discovers that Sarah has cheated on him with Dave, and sleeps with Tanya as revenge, leading to a showdown at Dave's house. Ultimately, Dave must slay the ghosts of the past, and decide whether to pursue new love with Sarah. Cast David Tennant – Dave Tiler Laura Fraser – Rita Morris Suranne Jones – Sarah, Rita's best friend Isla Blair – Beatty, Rita's adoptive mother Warren Brown – Matt, Sarah's partner Rupert Graves – Stuart, Lucy's biological father Mark Heap – Robin, Anna's husband Neve McIntosh – Anna, Rita's adoptive sister Natasha Watson – Lucy, Rita's 15-year-old daughter with Stuart Chris Hegarty –