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 Christian Camargo as Dr. Alexander Sweet Samuel Barnett as Renfield 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 Áine Hayden as Woman Elif Knight as Beggar Woman Patrick Joseph Byrnes as Barman - Train Jack Olohan as Sailor #2 Andrew Bridgmont as Ship Doctor Bradley Hall as Sailor #1