Professor T season 4 | Release date speculation, cast and plot | Radio Times

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The show was renewed for season 4 before the third run had even aired, with star Ben Miller saying at the time that the enigma of the central character was "a mystery I hope to investigate for many seasons to come."

Jo McGrath, executive producer and CCO at production company Eagle Eye, added: "Professor T's unique mix of clever cases, compelling series arcs and an outstanding cast of warm, memorable characters have proven to be a big hit with audiences around the world."

But when can we expect new episodes? Read on for everything you need to know about Professor T season 4.

Professor T season 4 release date speculation: When will it air?

While a UK release date is still unconfirmed, there's better luck for fans across the Atlantic: US audiences can tune in to the new season on PBS beginning from Sunday 24th August at 8pm ET.

We still hope season 4 will arrive on ITV in the UK later in 2025, although there's been no confirmation at this stage.

But with the US air date now confirmed, there's every chance the new instalment will come to the UK n the very near future – watch this space for updates.

Professor T season 4 cast: Who's returning?

Sunetra Sarker plays DCI Maiya Goswami, standing at her desk in her office — Sunetra Sarker plays DCI Maiya Goswami in Professor T. Eagle Eye Drama for ITV AND ITVX

Alongside Miller as Professor Jasper Tempest, the following cast members are also returning:

Barney White as DS Dan Winters
Frances de la Tour as Adelaide Tempest
Juliet Stevenson as Dr Helena Goldberg
Sunetra Sarker as DI Maiya Goswami

But Emma Naomi is not returning after DS Lisa Donckers was struck by a car and killed.

You can also expect plenty of new guest stars, and a few other familiar faces, too.

Professor T season 4 plot: What will happen?

Ben Miller as Professor T, wearing a blue suit — Ben Miller as Professor T. ITV

The series will pick up six months after the events of season 3, with Winter, Tempest and the rest of the team still coming to terms with the death of Donckers as they turn their attention to a "dangerous crime wave", according to Variety.

The "gloves are well and truly off" for our leading man in his lectures, and he also explores a "new musical pursuit".

Elsewhere, romance is on the cards for Adelaide, the "lines between professional and personal become blurred" for Helena, and Winter becomes Maiya's right-hand man.

Is there a Professor T season 4 trailer?

Yes – and you can watch it below:

Professor T seasons 1-3 are available to stream now on ITVX.

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Abby RobinsonDrama Editor

Abby Robinson is the Drama Editor for Radio Times, covering TV drama and comedy titles. She previously worked at Digital Spy as a TV writer, and as a content writer at Mumsnet. She possesses a postgraduate diploma and a degree in English Studies.