John Kavanagh

as Tommy

as Jim

as Mr. Westmoreland

as Arthur Browne

as Sir Alfred Beit

as Georgia's Boss (1 episode)

as The Seer (4 episodes)

as Le Gris' Priest

as Gatekeeper (voice)

as Windsor

as Narrator (voice)

as Dad

as Arturo Toscanini

as The Seer (archive footage) (6 episodes), as The Seer (1 episode)

as Junior

as Inspector Michaud

as Reverend Benham

as Fionan and Little Kevin's Dad

as Pope Leo IV (1 episode), as The Seer (voice) (1 episode), as The Seer (39 episodes)

as Edward Carson (1 episode)

as John O'Connor (4 episodes)

as Reverend Smith

as Cardinal Campeggio (4 episodes), as Cardinal Lorenzo Campeggio (10 episodes)

as Harry