'Professor T' Heads Back to School for Season 4 When Summer Ends

Ever since it debuted in July 2021, the U.K. adaptation of Professor T has bounced around the PBS schedule like a rubber ball. Season 2 of the series arrived in September 2023, and Season 3 in June 2024. Obviously, that could only mean that Season 4 would debut sometime in August 2025, since the month so obviously got skipped over, and while that sort of logic probably wouldn't hold up for one second under the scrutiny of Jasper Tempest (Ben Miller), PBS did us a solid anyway, scheduling the return of Professor T for Season 4 to align with the debuts of The Marlow Murder Club Season 2 and Unforgotten Season 6 the weekend before Labor Day 2025.

Much like last season, Professor T's renewal was already commissioned months ahead of time, and Season 5 is already greenlit. That's a record for the franchise, which has four other versions: the original Belgian series, and the German, French, and Czech spinoffs, all of which preceded the U.K. version. The French and Czech versions flopped, but the original ran three seasons (totalling 39 episodes) and the German variation four seasons (totalling 16 episodes). That makes this version of Professor T hitting Season 5 a record in a sense, now officially the longest running version.

However, it's still only second in terms of episode count—Season 4 brings the U.K. version to 24 episodes, and Season 5 will bring the total to 30. The U.K. set version will have to reach Season 7 if it wants to be considered the most popular version of the lot. (Somehow, that doesn't seem like it will be a problem.)