Crimewatch features the latest on the Joanna Yeates murder case, as well as asking viewers to help identify the murderer of 23-year-old Londoner Ricardo Cunha. He was shot dead in his own home with a 1924 Webley revolver, in what police believe is a shocking case of mistaken identity.

Cases include the murder of 24-year-old aspiring teacher Samuel Guidera in South London and the shocking rape of a woman in Manchester's busy city centre.

Detectives appeal for help in cracking some of the UK's toughest cases, including a violent raid by a masked gang on the country mansion of billionaire founder of Phones4U, John Caudwell; and the appalling rape of an A-level student, attacked as she walked home on Valentine's Day.

Detectives appeal for help in cracking some of the UK's toughest cases, including the suspicious death of a woman whose remains were found in woods 90 miles from her Edinburgh home; and a brutal burglary in Hertfordshire, in which a mother was badly beaten in front of her 11-year-old daughter.

Detectives appeal for help in solving the UK's toughest cases, including the 1986 murder of 16-year-old Elaine Doyle and an attack on an elderly businesswoman in the Peak District.

Detectives appeal for help in solving the UK's toughest cases, including the west Scotland arsonist who set fire to a family home, killing a man and his two children.

Detectives appeal for help in solving the UK's toughest cases, including the teenager 'kneecapped' on his doorstep with two blasts from a shotgun in a case of mistaken identity.

On the twentieth anniversary of the murder of Detective James Morrison in London's busy Covent Garden, police hope that a new reconstruction will help finally catch his killer.