John MacKay

as Fire Captain (1 episode), as Battalion Commander (1 episode)

as Seth's Father

as Captain Thomas

as Chief Groves

as Jack Turner

as Bob Brice

as Captain Paggio

as Dad

as George

as Raferty

as Nevins (1 episode), as Thomas Barnes (1 episode), as Michael Sutter (1 episode), as Mr. Mason (1 episode), as Internal Affairs Detective (1 episode)

as Jim Slaughter

as Dr. Gregory Ashton

as Oscar Henderson

as John Reid

as Dean

as Waldorf Manager

as First Cadet

as First Cadet (1 episode)

as Tony (1 episode)

as Matthew Hopkins