Guest Stars Andrew Spooner as Documentary Expert Toby Longworth as Male Guest Gina Gangar as Female Guest Atilla Akinci as Voice Coach Nisha Aaliya as Documentary Presenter Uncredited Lolly Adefope as Boiler Room Ghost Jim Howick as John (Boiler Room Ghost) Martha Howe-Douglas as Boiler Room Ghost Laurence Rickard as Nigel (Boiler Room Ghost) Mathew Baynton as Mick (Boiler Room Ghost) Ben Willbond as Boiler Room Ghost Simon Farnaby as Boiler Room Ghost