When UFOs and USOs (unidentified submersible objects) begin plaguing a massive naval exercise on the border of Russian waters, it's up to Hynek and Quinn to prevent World War III.

Museum director Marcus Dupayne is desperate to convince his recalcitrant brother Neville to sign the new lease on the Dupayne Museum - which is a family heiroom - when Neville then dies in a car fire.

Just when James is settling into life in the Dales, Siegfried's brother Tristan arrives; Siegfried is delighted and instructs James to take Tristan on his rounds to put his theory into practice.

The Murdochs, Constable Crabtree and Inspector Brackenreid are all lured into and trapped in a series of special escape rooms - and forced to play a deadly, escalating deathtrap game of riddles.

Just when James is settling into life in the Dales, Siegfried's brother Tristan arrives; Siegfried is delighted and instructs James to take Tristan on his rounds to put his theory into practice.

Jolyon insists on fulfilling his parental obligations as James tries to have him expelled from the company, and Soames promises Irene a move to Paris to support her dancing before the two get married.

Museum director Marcus Dupayne is desperate to convince his recalcitrant brother Neville to sign the new lease on the Dupayne Museum - which is a family heiroom - when Neville then dies in a car fire.

Murdoch investigates a murder at the Newsome Estate, which has declared itself a sovereign nation.

Murdoch's investigation of a murder at an opium den intersects with Brackenreid's pursuit of Nomi's missing friend.

A scrapyard owner's death draws Alberg into a case that collides with Cassandra and Holly's hunt for the elusive 'Creeper', a figure who leaves bouquets of enchanter's nightshade at local tragedies.

Siegfried is interviewing for the job of Attending Vet at Darrowby Racecourse and James faces a tough challenge when he diagnoses Hugh Hulton's pedigree horse Andante with a torsion of the bowel.

Jolyon insists on fulfilling his parental obligations as James tries to have him expelled from the company, and Soames promises Irene a move to Paris to support her dancing before the two get married.

The brutal assassination of Anna Fulford complicates Murdoch's life; after a woman's body is found, Murdoch fears that his friend has been caught by a crime family.

Reeling from a personal revelation, Murdoch seeks to avenge the murder of Anna Fulford; family is the one thing holding Brackenreid together as he resists pressure to resign from his job.

Eliza and Blake are drawn into a troubling case when a violent psychiatric patient escapes custody and leaves behind an unidentified body; Blake enlists Eliza's skills to unravel the case's secrets.

Dalgliesh heads to a seminary in West Sussex to investigate the murder of a senior churchman; he finds that nearly everyone had a personal grievance with the victim and that several of them are lying.

Rupert Newsome faces murder charges for his wife Lucinda's death. Though he chooses to defend himself, Effie does her best to assist.

A series of brutal animal attacks in High Park terrifies Toronto residents.

The brutal assassination of Anna Fulford complicates Murdoch's life; after a woman's body is found, Murdoch fears that his friend has been caught by a crime family.

Reeling from a personal revelation, Murdoch seeks to avenge the murder of Anna Fulford; family is the one thing holding Brackenreid together as he resists pressure to resign from his job.

Rupert Newsome faces murder charges for his wife Lucinda's death. Though he chooses to defend himself, Effie does her best to assist.

A series of brutal animal attacks in High Park terrifies Toronto residents.