An alien intelligence hitches a ride onboard the TARDIS to 15th century Italy, where a deranged astrologer attempts to harness its power.
Length 100 minutes
Tom Baker | Elisabeth Sladen | Jon Laurimore | Antony Carrick | Gareth Armstrong | Tim Pigott-Smith | Norman Jones | Robert James | Brian Ellis | Pat Gorman | James Appleby | John Clamp | Peter Walshe | Jay Neill | Peter Tuddenham | Peggy Dixon | Jack Edwards | Alistair Fullarton | Michael Reid | Kathy Wolff | Stuart Fell