David Harbour

as Alexei Shostakov

as Major Trautman

as Alexei Shostakov

as Santa Claus

as Archie Everhardt (voice)

as Self (uncredited)

as Alexei Shostakov

as Self - 'Stranger Things' Jim Hopper

as Gunny Lefferty

as Self

as Dan (voice)

as Jack Salter

as Ernest

as Santa

as Alexei

as Matt Wertz

as Gaspar

as Self

as David Harbour III / David Harbour Jr. / Frankenstein

as Hellboy / Anung Un Rama

as Ronnie

as Doug Dennison

as Dexter Tolliver

as John Morris

Thanks • 10 eps

as Floyd Smernitch • 7 eps

as Alexei Shostakov / Red Guardian (voice) • 4 eps

as Frankenstein (voice) • 7 eps

as Self - Narrator (voice) • 1 eps

as Buck (voice) • 10 eps

as Alexei Shostakov (voice) • 1 eps

as Self • 1 eps

as Self • 2 eps

as Vic • 6 eps

as Jim Hopper • 42 eps

as Self - Guest • 1 eps

as Hawk (voice) • 1 eps

as Self • 1 eps

as Self - Guest • 1 eps

as Self • 1 eps

as David Patrick • 13 eps

as Reed Akley • 10 eps

as Self • 2 eps

as Self • 1 eps

as David Potter • 13 eps

as Vietnam Memorial Head • 1 eps

as Robert Dalton • 2 eps

as Dr. Mason Baldwin • 1 eps