Watch horror moment Happy Valley stuntman screams in agony after being set alight in rare behind-the-scenes clip

THIS is the horror moment a Happy Valley stuntman screamed in agony after he was set on fire on set.

The smash-hit BBC One drama recently came to an end as the explosive final ever episode aired.

It saw murderer Tommy Lee Royce and Sgt Catherine Cawood, played by Sarah Lancashire come face-to-face.

The tense showdown saw Tommy set himself alight in scenes that shocked viewers at the time.

And now, the actor behind the evil villain has shared a rare behind-the-scenes clip from filming.

James Norton posted the video which shows his stunt double going up in flames on set.

He wrote: "Huge respect to @leonardstunts, my stunt double. The man literally goes up in flames."

The stuntman can be seen standing up from the kitchen table on fire before falling to the ground.

It's at that point Sarah Lancashire's double steps in and tries to supress the flames with a towel.

As the director shouts cut on the final scene members of production move in with fire extinguishers to put out the flames.

Fans flooded the comments section with praise, as one said: "The acting was superb! Huge respect to your stunt double though!"

A second said: "Wow! Thank you for capturing this/sharing."

"Oh my goodness ! I held my breath the whole way through that! What a man! Perfect stunt double for any future role eh," said a third.

While a fourth commented: "An amazing series. A huge well done to everyone involved. Probably the best tv series ever."

To viewers at home, they watched as the criminal was taken away by ambulance following the disturbing scenes.

Cawood later received a text on her mobile that said: “TLR dead, hospital just rang.”

But because viewers never saw him die, and he was still breathing after the scorching, many speculated it could be a plot twist for a possible fourth series.