Suggestions by @framefreak

Doug Jones

as The Failed Hybrid in The Breeders Beneath

Joel Kinnaman

as Deputy Owen Kerns in The Breeders Beneath

Anya Taylor-Joy

as Mira Quinn in The Breeders Beneath

Jessica Chastain

as Dr. Lana Reeve in The Breeders Beneath

Demián Bichir

as Agent Art Delgado in The Void Below

Antonia Thomas

as Agent Kiara Evans in The Void Below

Richard Kind

as Agent Stan Berkowitz in The Void Below

Michael Ealy

as Agent Felix Ward in The Void Below

Sandrine Holt

as Agent Margo Lin in The Void Below

Wyatt Russell

as Brent Lawson in The Void Below

Geraldine Viswanathan

as Asha Khanna in The Void Below

Marin Ireland

as Riley Thorn in The Void Below

Kiki Sukezane

as Dr. Ruth Kaneko in The Void Below

Arturo Castro

as Dr. Jorge Mendez in The Void Below

Sendhil Ramamurthy

as Dr. Alan Kapoor in The Void Below

Carice van Houten

as Dr. Petra Volkov in The Void Below

Daniel Henney

as Dr. Nolan Rhee in The Void Below

Betty Gabriel

as Dr. Alana Pryce in The Void Below

Keith David

as Pastor Lewis Crane in The Void Below

Owen Teague

as Chad Riley in The Void Below