When serial killer Tommy Cummins offers to reveal the locations of his remaining victims, he insists on speaking only to Alberg, the detective who put him away.

When teenagers stumble upon the body of a young girl in a pit; Dalgliesh and Miskin arrive in Norfolk to assist with the inquiry - and eventually get caught up in a bigger murder mystery.

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.

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.

A part-time university student is found dead with electrical burns on the head, and two newly-arrived American psychology professors with a penchant for unusual experiments may be responsible.

As the Murdochs investigate a series of murders at a country inn while on holiday, Crabtree and Higgins investigate the beheading of an accountant in a community garden.

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.

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.