Guest Stars Pete MacHale as Leon Toheeb Jimoh as Marcus Ursula Holliday as Cass Stewart Anneika Rose as Natalie Milly Thomas as Sara Hoyt Anson Boon as Anton Garin Laurie Kynaston as Jonah Green Olwen Fouéré as Jane Ace Bhatti as Dr Adu Talitha Wing as Diane (Meredith's Assistant) Aoife McMahon as Rita Claudia Jolly as Nurse (Dr Adu)