In the Netflix feature The Good Nurse, Redmayne plays Charles Cullen, who used intravenous tubes to poison patients with lethal drugs.
Tobias Lindholm said he recruited nurses, doctors and paramedics to make the performances of his lead actors, Redmayne and Jessica Chastain, all the more “naturalistic”.
An Oscar-nominated director has cast two dozen real-life medics in a film that stars Eddie Redmayne and is based on the true story of a nurse who murdered patients in his care.
He added that the medics welcomed the fact that the film was critical of the system, rather than individuals.