Guest Stars Sarah Greene as Hecate Poole Douglas Hodge as Inspector Bartholomew Rusk Simon Russell Beale as Ferdinand Lyle Shazad Latif as Dr. Henry Jekyll Samuel Barnett as Renfield Christian Camargo as Dr. Alexander Sweet Cokey Falkow as Scarman Co Starring Jack Hickey as Junior Inspector Casper Allpress as Jack Pandora Colin as Maggie / Marjorie Sebastian Croft as Boy Familiar Jack Greenlees as Lead Familiar Jonathan Delaney Tynan as Colleague of Dr. Sweet Elif Knight as Beggar Woman Áine Hayden as Woman Patrick Joseph Byrnes as Barman - Train Jack Olohan as Sailor #2 Andrew Bridgmont as Ship Doctor Bradley Hall as Sailor #1