TV Guide 5USA Thursday

Gibbs investigates the discovery of a woman's mummified remains, following a trail of clues that takes him and the team to Florida, where they search for another victim who mysteriously disappeared. One of their few leads is a manual on the secret of being a good wife - which eventually points them in the direction of a serial killer

A marine helicopter is discovered abandoned in a crop circle with its pilots missing, and witnesses report seeing strange lights in the night sky, adding to the intrigue surrounding the case. Gibbs orders the sightings to be kept under wraps for fear of attracting the attention of UFO enthusiasts, before uncovering a dark secret involving local residents. Guest starring Timothy Bottoms (The Last Picture Show)

Briscoe and Curtis investigate the disappearance of a wealthy couple seemingly snatched from their apartment building, but suspicion eventually falls on a man suffering from mental illness - presenting Ross with a tough ethical decision. Police drama, starring Jerry Orbach, Benjamin Bratt and Carey Lowell

Curtis and Briscoe question a disabled boy's bereaved family in an attempt to establish whether his death was a mercy killing or cold-blooded murder, and discover his mother is not as respectable as she makes herself out to be. Police drama, starring Jerry Orbach and Benjamin Bratt

A female cop is found stabbed to death in a park alongside a Hispanic male with a near-fatal gunshot wound. Further investigations lead Briscoe and Curtis to a girl who suffered a tough childhood in the care of an abusive father and drug-addicted mother, and her alibi appears to be flimsy at best. Robert Vaughn guest stars

Briscoe and Curtis join forces with their Baltimore colleagues to investigate the murder of a government official. It soon emerges that the deceased had been stalked by a man because of her lesbian affair with a married woman, who pleads for her identity to be kept secret. However, an over-zealous attorney embarks on a crusade to make the information public knowledge, going so far as to take the officers to court in an effort to force them to reveal their source - but his interest in the case raises suspicions

The officers discover a girl's body in a hospital emergency room, and the subsequent investigation leads to the revelation that she was killed during an unauthorised exorcism carried out by an overzealous nun who claims her behaviour was directed by the voice of an angel. Jerry Orbach and Sam Waterston star

The investigation into a fatal attack on a semi-retired divorce lawyer by a disgruntled client reveals a network of bribery and corrupt medical practices. As the team unravels the tangled threads of the case, it appears a trio of doctors may be destined for prosecution - and it is not long before a further murder occurs. Police drama, starring Sam Waterston and Jerry Orbach

A high-school student is killed by a hit-and-run driver, with tyre marks at the scene indicating it was deliberate. The case is complicated when the chief suspect is murdered by his mother. Jerry Orbach and Sam Waterston star