Iron & Ice (2016)

 Doctor Jennie Kidd-Trout / ... (2 episodes)

 Source (2 episodes)

 Samuel Clemens (2 episodes)

 Lady Sarah Forbes (2 episodes)

 Richard Roe (2 episodes)

 Major Domo (2 episodes)

 Queen Victoria (2 episodes)

 Admiral Wolsey / ... (2 episodes)

 Colonel Nicholson / ... (2 episodes)

Minoan Guard

Nikola Tesla