Undercover Heart is a 1998 BBC 1 drama series about an undercover vice squad detective, Tom Howarth (Steven Mackintosh),who goes missing while investigating the murder of a prostitute. His wife Lois (Daniela Nardini),and his best friend Matt (Lennie James),who are also detectives, set out to search for him, but end up falling in love with one another.

• Steven Mackintosh
• Daniela Nardini
• Lennie James
• Lisa Coleman
• David Troughton
• Tony Curran
• Trevor Laird
• Leonie Elliott