SAS: Who Dares Wins fans seriously distracted by ‘unrecognisable’ star in Jungle Hell premiere

SAS: WHO Dares Wins fans were left seriously distracted by an 'unrecognisable' star as the new series kicked off.

Viewers tuned in on Monday night as the hit military training programme returned to Channel 4.

This time there was a twist as the show headed to Vietnam for the first time.

Chris Oliver has joined the team alongside Rudy Reyes and Jason Fox to put the new hopefuls through their paces.

But viewers were left distracted by Rudy's appearance.

The former active duty United States Marine was the Chief Instructor on last year's series but has returned this year as a regular DS.

Fans didn't "recognise" the star as he cut off his locks and sported a much more groomed look.

Taking to social media, one viewer said: "Much preferred Rudy with his long hair."

Another posted: "Rudy’s cut his hair?!"

"Rudy has a new haircut? Barely recognised him," said a third.

While a fourth commented: "Rudy donning a new hairstyle."

Meanwhile, an upcoming episode of the show will see production thrown into chaos when a medical emergency occurs.

In a first look clip, recruits panic as in their dorms, Aliyah (aka. No. 12) starts fitting while lying down in her bed.

The 26-year-old Londoner looks terrified as her eyes shoot open wide and her new co-recruits rush to help her.

As she starts convulsing, someone commands the filming team to "get an ambulance now".

The terrifying scenes will play out in later episodes.

SAS: Who Dares Wins airs on Channel 4 and is available to stream on All4.