Stephen Hawking (12 episodes)

Self (archive footage) (2 episodes)

Self (1 episode)

Creator

Narrator (3 episodes)

Himself - Host (6 episodes)

Himself

Self

Self - Guest (1 episode)

Self - Host (6 episodes)

Self (3 episodes)

Stephen Hawking (7 episodes)

Self - Host (5 episodes)

Presenter (5 episodes)

Himself (3 episodes)

Writer (3 episodes)

Creator

Stephen Hawking (voice)

Self (2 episodes)

Self - Host (6 episodes)

Self (1 episode)

Stephen Hawking (voice) (2 episodes)

Stephen Hawking (voice) (5 episodes)

(7 episodes)

(6 episodes)

(3 episodes)

Holodeck Stephen Hawking (1 episode)

Self (1 episode)

Himself (1 episode)