Ransom, the US CBS series which Joseph Millson filmed a guest episode for last December, begins broadcast of series 2 this month. According to CBS Express, Joseph will appear as Keith Taylor in the "Secrets and Spies" episode, which will air on 21st April 2018 at 8pm ET.

“Secrets and Spies” – Eric and Oliver plunge into a world of espionage when a CIA spy disguised as an American diamond broker traveling with her family is kidnapped in Vienna. Also, Oliver gets an interesting job offer, on RANSOM, Saturday, April 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network.