Professor T is persuaded by a former student - now a police detective - to help her investigate a serial rapist.

When a blameless librarian is poisoned at a drinks reception at a museum, Professor T is called upon to narrow down the list of possible suspects.

Professor T becomes embroiled in a hostage situation, but his unconventional negotiating tactics go down badly with the police. Old flame Christina reveals all is not well at home.

When Professor T helps investigate the disappearance of a six-year-old girl, tensions rise between DI Paul Rabbit and Jasper until they come to blows.

Professor T befriends a vulnerable girl and is convinced she is the key witness to a murder. When Lisa's boss confronts her about her relationship, Lisa makes a bold decision.

When an attempt is made on a billionaire businessman's life, Professor T suspects the culprit may be much closer to home than the police suspect. Plus, it's Professor T's birthday.