TV Guide 5USA Monday

Jessica visits the zoo to research her latest novel, where a venomous snake kills an animal rights activist. Mystified as to how the black mamba could escape, the amateur sleuth tries to discover whether there was a human hand behind the incident. Angela Lansbury stars

A childhood friend of Gibbs' dead daughter is stalked by a marine who recently returned from Iraq, and asks the agent for help. Memories of his murdered family lead him to make the case a priority, but he acts on his initiative and leaves HQ without his badge, making DiNozzo fear he is risking his job for a personal vendetta. Mark Harmon and Michael Weatherly star

A taxi driver and an admiral working at the Pentagon are found executed by the side of a road, but the agents have trouble ascertaining a motive - until they uncover links to a woman searching for her missing husband, a political refugee from Africa. Meanwhile, McGee makes a discovery about his new girlfriend. Starring Sean Murray, Michael Weatherly and Mark Harmon

Abby babysits a bright nine-year-old while the other members of the team try to locate the youngster's missing father - a survivalist wanted in connection with a case of robbery and murder. The search takes them deep into the wilderness - where a startling discovery awaits. Crime drama, starring Mark Harmon and Sean Murray

Briscoe and Green investigate the murder of a clothes shop owner during an apparent robbery. An open lock suggests someone who works there was responsible, and the trail eventually leads to the son of the dead man's business partner, whose shady dealings were at risk of being exposed. However, the suspect flees to Israel before police have a chance to question him

Van Buren orders Briscoe and Green to reinvestigate unsolved cases, starting with the murder of a teenager 20 years previously. However, they discover much of the evidence gathered at the time has vanished, and the detective in charge of the case may have pursued an innocent man to protect the real culprit. An unexpected confession allows the case to end up in court again, but legal trickery makes a conviction an unlikely prospect

A man with a history of violence is arrested for the murder of his son's school ice-hockey coach, but pleads mitigating circumstances. Helped by a glib defence lawyer, he claims that he committed the crime while suffering from a previously unknown mental condition he calls 'sports rage'

The team investigates the murder of a student who proves to be the estranged son of a powerful real-estate tycoon. The finger of blame points to a mystery woman seen with the victim outside the college, and when tracked down, she claims to be his sister. However, Briscoe is not convinced, and suspects an extortion scheme

Briscoe and Green are convinced that former career criminal Cally Lonegan has killed his business partner who had been stealing company money. However, their suspect has a cast iron alibi - he is a Mob informant and at the time of the murder was being followed by the FBI. The case takes a more complicated turn when an eyewitness is found dead and the detectives discover Lonegan has a twin brother

Briscoe and Green investigate the attempted murder of a tough judge, but when the culprit is found Carmichael and McCoy have a difficult time building a case. Police drama, starring Jerry Orbach, Sam Waterston and Jesse L Martin