The Tsuranga Conundrum
In the episode , alien time traveller the Doctor ( Jodie Whittaker ) and her companions – Graham O'Brien ( Bradley Walsh ) , Ryan Sinclair ( Tosin Cole ) , and Yasmin Khan ( Mandip Gill ) – are brought aboard a medical ship to recover from injuries they recently endured , only to find themselves dealing with a dangerous alien creature that threatens the ship and those being transported by it . 
<triplet> Doctor <subj> Jodie Whittaker <obj> performer <triplet> Graham O'Brien <subj> Bradley Walsh <obj> performer <triplet> Yasmin Khan <subj> Mandip Gill <obj> performer