Made for ITVX by Tiger Aspect, the series was directed by Jim Field Smith, and written by George Kay.
[1] In September 2021 it was announced that Tennant and Margarita Levieva were to take on the roles of Alexander and Marina Litvinenko for ITV and Nordic Entertainment Group from a script from George Kay, with Tiger Aspect also producing.
Jim Field Smith was announced as director with Neil Maskell and Mark Bonnar appearing as the police officers who interviewed Litvinenko in his hospital bed.
[6][7] To air in conjunction with the series, ITV commissioned Firecracker Films to produce an hour-long film detailing the events of the Polonium-210 poisoning of Litvinenko in 2006, including an interview with Marina Litvinenko, Assistant Commissioner for the Metropolitan Police Andy Hayman and James Cairns, who was the Police Radiation Protection Advisor.
[8] In March 2022 the project was announced to be included in the productions set to be launched in the UK on the new for 2022 ITV streaming service ITVX.