*Neil Brooker as Eoghan Blakewell (IIFI)

Tobias Nilsson as Anton Sørensen (IIFI), Swedish Crew Member, and the real Captain Kurt Dalström

*John Buckett as Tristan Elliott, Pete (Press Gang) & Donald Noble

Catrin Jones as Sylvia Grant and Pregnant Woman/Smuggler

Brian Karasek as Benjamin Wiley (IIFI)

M Perry-Brooker as Hospital Receptionist and Jennifer Morgan (IIFI)

James Leatherbarrow as James Gilman (DPSR) and Mr. Raine (Train Conductor)

Camille Brouard as Andy Morwood (DPSR)

Jorge Williams as Keith McPherson (Charter Captain), Henderson (Butler) and Carl Chandler (DPSR)

Jonthan Inbody as Det. Nathaniel Garrison (NAPIS)

Ryan Moore as Det. John Lees (NAPIS)

Alain Breton as Alex Légaré

*Cole Brew as Dylan Finley & Paul Latimer

Michael Wilson as Mr. Taylor (Apartment Landlord), Thomas Elliott (DPSR) & Tom Clarke (Smuggler)

DK Sellers as Waiter (Sunderland Hotel), Greg Thompson (DPSR), Ron Clarke (Smuggler), Rev. David Pearson (St Mary's, Whitby) and Phelps (DPSR Security)

**Matthew Sielewicz-Stanhope as Otis Marsh

Victoria Hughes as Donna Bennett (Sunderland Apartment resident), Professor Evelyn Quaterman and Nyarlathotep

**Neil James Rhind as Ernie Waites (Retired doctor, Sunderland), Robert Akeley (Deceased author; recording), Roger Dent (News Reporter on TV) and Benson (Security).

John Holmes as Captain Bill Turner (Whitby; the Persephone)

Benedict Daniels as Daniel Carter (Charter boat captain, Sunderland), Todd (Press Gang) and Henry Carlson (Reporter)

**Tara Glover as Fiona Campbell (Hospital Domestic Staff)

Kala Rao as Dr Anika Bakshi (Sunderland Hospital)

Dom Richards as Dr. Trent (Whitby)

**Mowley as Det. Insp. Alistair Compton (aka Brian; Tristan's Contact)

Benny Lindberg as Capt. Kurt Dalström/Henrik Berkel

Michelle Ehman as Lauren Robinson (Location Reporter) and Extra Female Voices

Lynn McKinnon as Paramedic (Whitby West Pier)

Heather L O'Neill as Liz Byford (DPSR Security, Whitby Bridge)​​​​

Kelly Sellars as Tracey Douglas (Lady by East Pier)

Matt Hughes as Gary (Pier Security)

​​

Series Narrator: John Holmes​

Trailer Narration and Content Warnings by : Jorge Williams​

*Extra Male Characters by: Cast Members​