
An alien intelligence hitches a ride onboard the TARDIS to 15th century Italy, where a deranged astrologer attempts to harness its power.
Tom BakerThe Doctor
Elisabeth SladenSarah Jane SmithJon LaurimoreCount Federico
Antony CarrickCaptain Rossini
Gareth ArmstrongGiuliano
Tim Pigott-SmithMarco
Norman JonesHieronymous
Robert JamesHigh PriestBrian EllisBrotherPat GormanSoldierJames ApplebyGuardJohn ClampGuardPeter WalshePikemanJay NeillPikeman
Peter TuddenhamTitan (voice)