Season 16 of Dr Who. That means the Ribos Operation, The Pirate Planet, The Stones of Blood, The Androids of Tara, The Power of Kroll and the Armageddon Factor. The whole search for The Key to Time. I had forgotten just how attractive Mary Tamm was in this. The Pirate Planet is the best of them as there is a lot of comedy but also a very serious point about what the plan behind the facade was doing. What is best about all the shows is the playing. Tom Baker is just marvellous and is served by some very good guest stars like Ian Cuthbertson in The Ribos Operation, Bruce Purchase in Pirate Planet, Peter Jeffrey in The Androids of Tara, Neil McCarthy and Philip Madoc in The Power of Kroll, and John Woodvine in the Armageddon Factor.