Guest Stars Yani Alekansandrov as Humphrey's Body Richard Durden as Charles Worthing Ed Kear as Dave Houses Ania Marson as Heather Button Steve Oram as Terry Anya McKenna-Bruce as Jemima Uncredited Lolly Adefope as Boiler Room Ghost Laurence Rickard as Nigel (Boiler Room Ghost) Jim Howick as John (Boiler Room Ghost) Martha Howe-Douglas as Boiler Room Ghost Mathew Baynton as Mick (Boiler Room Ghost) Ben Willbond as Boiler Room Ghost Simon Farnaby as Boiler Room Ghost Katy Wix as Boiler Room Ghost