Directed by:
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- Andrew Leman
- H.P. Lovecraft
- Sean Branney
- Ramón Allen Jr. ... Louis
- Leslie Baldwin ... Greta Johansen
- Daryl Ball ... Officer Cassidy
- John Bolen ... The Listener
- Aidan Branney ... Swamp Boy
- Sean Branney ... Pub Man
- Andra Carlson ... Nurse
- Mike Dalager ... Guerrera (as Michael Dalager)
- Erin Emmalee ... Nancy
- Chia Evers ... Cultist
- Matthew Q. Fahey ... Briden
- Chad Fifer ... Henry Wilcox
- Matt Foyer ... The Man
- Bruce Graham ... Claude
- Kirsten Hageleit ... Cultist
- Clarence Henry Hunt ... Castro
- Hannah Rose Jabaley ... Swamp Girl
- Ike E.Z. Jabaley ... Swamp Baby
- John Jabaley ... Swamp Papa (as Ed Ruffin)
- John Joly ... Sgt. Bacon
- J. David King ... Cultist
- Daniel Kirsner ... Angstrom
- John Klemantaski ... Prof. Bell
- Jennifer Knighton ... Tilly
- Chris Lackey ... Parker
- Andrew Leman ... Unhelpful Bureaucrat
- Carlos Linares ... Hector
- Ralph Lucas ... Prof. George Gammell Angell
- Richard Lucas ... Thibidoux
- Barry Lynch ... Prof. Webb
- Matthew Malcomson ... Officer Langfield
- Rebecca Marcotte ... Swamp Widow
- Jason McCune ... Professor Quintana
- David Mersault ... Police Inspector John Raymond Legrasse
- Dan Novy ... Esquimaux Shaman / Cultist
- Steven O'Connor ... Tyler
- Patrick O'Day ... Johansen
- Ryan Oliver ... Cultist
- Jason Owens ... Prof. Quintana
- David Pavao ... Rodriguez
- Jason Peterson ... Officer Stanton
- D. Grigsby Poland ... Prof. Tutchton
- Kalafatic Poole ... Bartender
- Vivica Prentice ... Museum Clerk
- Jonathan Putnam ... Cultist
- Ed Ruffin ... Swamp Papa
- Josh Thoemke ... Hawkins
- Aaron Vanek ... Cultist
- Noah Wagner ... Captain Collins
- Mona Weiss ... Cultist
- Erika Zucker ... Swamp Mama
- Susan Zucker ... Landlady
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