Actors Maisie Smith and Jennifer Ellison, entrepreneur Calum Best, Olympic medallist Fatima Whitbread, reality TV stars Pete Wicks and Ferne McCann, ex-footballer Ashley Cain, influencer Amber Gill, dancers AJ Pand Curtis Pritchard, Olympic sprinter Dwain Chambers, taekwondo Olympic gold medallist Jade Jones, boxer Shannon Courtenay, and Paralympic high jumper Jonathan Broom-Edwards take part in a special edition of the training challenge. In the first episode, the recruits must crawl through sand in blistering 40-degree heat, before facing every desert soldier's worst nightmare - a gas attack.

Starring:

Shaun Dooley, Jason Fox, Rudy Reyes, Anthony Middleton, Mark Billingham, Ollie Ollerton, Jay Morton, Melvyn Downes, Remi Adeleke, Anthony Stazicker

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