Professor T Season 4: Release Date, Cast, and Plot Details

The brilliant, obsessive, and impeccably dressed criminologist is returning to our screens. Professor Jasper Tempest, portrayed by the acclaimed Ben Miller, is set to unravel a new series of intricate Cambridge crimes in the highly anticipated fourth season of Professor T. Following a critically acclaimed third season that left viewers in shock, the new chapter promises deeper character exploration, gripping mysteries, and the signature psychological depth that has defined the hit series. Here is everything you need to know about the return of this beloved drama.

When and Where Can You Watch Professor T Season 4?

The premiere date for Professor T Season 4 is officially set for Sunday, August 24, 2025, at 8:00 PM ET on PBS in the United States. The season will consist of six episodes, released weekly on the same night. For viewers who prefer to binge-watch, PBS has confirmed that all six episodes will be available for streaming on-demand via PBS Passport starting from the premiere date. International audiences, particularly in the UK, can expect the season to arrive on ITV and BritBox, though specific airdates for those regions are yet to be announced.

What is the Central Plot of Professor T’s New Season?

Season 4 picks up six months after the devastating death of DS Lisa Donckers, an event that has profoundly impacted Professor T and the entire police team. Grappling with intense grief, Jasper Tempest has withdrawn from his consulting role with the Cambridge police force. However, his unique genius is inevitably pulled back into the fray by a string of complex new cases that only he can solve.

This season delves deeper into Jasper’s psyche than ever before. Encouraged by his therapist and, surprisingly, his formidable mother Adelaide, he begins to explore music as a potential outlet for his trauma and obsessive-compulsive disorder. Alongside the central investigations, the personal lives of the ensemble cast take center stage, exploring themes of romance, recovery, and resilience, making for the most emotionally rich season to date.

Who is Returning to the Cast for the New Season?

The core cast returns to bring these compelling stories to life. Ben Miller leads as the enigmatic Professor Jasper Tempest, with Frances de la Tour reprising her role as his sophisticated and sharp-witted mother, Adelaide. Juliet Aubrey returns as Chief Inspector Christina Brand, and Barney White is back as DS Dan Winters. Sarah Woodward also returns as the ever-loyal Ingrid Snares.

Notably absent is Emma Naomi, whose character, DS Lisa Donckers, was killed off in the previous season’s finale. Her death serves as a pivotal emotional catalyst for the narrative moving forward.

Is Professor T Season 4 the Final Season?

Good news for fans: Season 4 is not the end. Production companies have already greenlit a fifth season, ensuring that the story of Professor Jasper Tempest will continue beyond the events of this upcoming chapter. This renewal allows the current season to explore its character arcs fully, knowing the journey is far from over.

The enduring appeal of Professor T lies in its perfect blend of intellectual murder mysteries and deeply human storytelling. With a confirmed premiere date, a emotionally charged plot, and the return of its stellar cast, Season 4 is poised to be a must-watch event for mystery enthusiasts. Mark your calendars for August 24, 2025, and prepare to return to the captivating, chaotic mind of Professor T.

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Must Know

How many episodes are in Professor T Season 4?
Season 4 consists of six episodes. They will air weekly on PBS in the U.S. starting August 24, 2025. All episodes will be available for on-demand streaming on PBS Passport from the premiere date.

Where can I watch Professor T Season 4 in the USA?
The show airs on the PBS television network on Sundays at 8:00 PM ET. It is also available for streaming on the PBS website, the PBS app, and the PBS Masterpiece Amazon Channel. A PBS Passport membership grants immediate access to all episodes.

Is Lisa Donckers in Professor T Season 4?
No, the character of DS Lisa Donckers, played by Emma Naomi, will not appear in Season 4. Her death in the Season 3 finale is a significant plot point that deeply affects Professor T and the team throughout the new season.

Will there be a Professor T Season 5?
Yes, a fifth season of Professor T has been officially commissioned and confirmed by the production team. Filming details and a potential release window have not yet been announced.