This one's a fun story pitting Bernice Summerfield against the Valeyard, but for the first two acts is led to believe that the Valeyard is a future incarnation of the Doctor so goes along with what he's planning. It's a great showcase in how the Valeyard differs so much from the Doctor in his attitude and approach to situations. There's nothing that much much to get into really, Michael Jayston is unquestionably the showstealer in this