Grantchester is continuing to air its penultimate season tonight but as fans slowly prepare themselves to say goodbye, there is another “phenomenal” period drama ready to stream for free.

Grantchester season 29 is in full swing but there’s another series that viewers can’t stop re-watching.

DI Geordie Keating (portrayed by Robson Green) and Reverend Alphy Kottaram (Rishi Nair) are back in action for Grantchester’s tenth season, with episode seven airing tonight, Thursday, February 12, on ITV.

This time, Cathy (Kacey Ainsworth) and Mrs Chapman (Tessa Peake-Jones) venture into the world of fashion boutiques. However, their plans hit a snag when their promotional photographer turns up dead.

But if you’re in the mood for something different tonight, there’s an alternative that fans are hailing as an “absolute masterpiece”.

Set in the 1960s rather than the 1950s, this mystery series follows a novice detective and his mentor as they unravel intricate murder cases in and around Oxford.

Endeavour serves as a prequel to the highly popular Inspector Morse, based on Colin Dexter’s novel series, which ran for 13 years before wrapping up in 2000.

The younger version of Inspector Morse, Endeavour Morse, is played by Betrayal and Vigil star Shaun Evans, who joins the force as a rookie detective constable.

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He shares the screen with his mentor DI Fred Thursday, played by actor Roger Allam, and Jim Strange star and Outlander Blood of My Blood actress Sara Vickers, who portrays Joan Thursday.

Whilst Grantchester earns a solid 76% on Rotten Tomatoes, Endeavour has achieved a remarkable 90% rating, with all nine series available to stream free of charge on ITVX.

On Reddit, an enthusiastic fan declared: “Endeavour is an absolute masterpiece.

“The finale messed me up. It’s not happy good feel times, but it’s phenomenal.”

Another devotee on IMDb hailed it as the “best detective show ever”, whilst a third proclaimed it was “without doubt, a triumph”.

One viewer enthused: “This show is proof that you can have an amazing show without the garbage!”

Another commenter described Endeavour as “superb” before elaborating: “It is such a good show that I can hardly express it.

“The writing, acting, production values, and direction are as fine as those in any film I’ve ever seen.”

Several viewers admitted they’d found themselves rewatching the series, with one posting: “As soon as I had finished watching I watched it again taking in all the things I had missed the first time.

“I’ve watched this 3 times and will definitely watch it again. My only complaint is that there aren’t enough episodes”, confessed another user.

Someone else praised: “You can just feel the old atmosphere through the screen. Amazing actors & music. Feels really authentic. A must watch!”

Endeavour is available to watch on ITVX.