6. Mawdryn Undead (Story 125, 1983)

When Tom Baker left the role of the Doctor after seven years, there were many questions about who would take his place. Eventually the duty fell to Peter Davison, previously known for his role on All Creatures Great and Small. Davison was left with huge shoes to fill, and its a great testament to his skill as an actor that his Doctor is so very well thought of today. While Davisons stories werent always the best, and while many people found the TARDIS a bit crowded with many of the episodes featuring three companions, there are still some real gems from his time at the Doctor. Lets have a look at six.http://www.youtube.com/watch?v=BFa8Nj4dGJc The Brigadier returns! Twice! Yes, we get two times the Brig in this one, and get a nice example of the Blinovitch Limitation Effect in action when the two touch. Not a wise idea, as it turns out. This story also introduces Turlough (Mark Strickson), a ratty little twit who became the Doctors companion but never really became all that likable a character, at least not to me. This is another one of those stories thats chock-full of continuity and it does do a great job of introducing Turlough, as well as setting up his ongoing conflict with the Black Guardian, played with sinister glee by Valentine Dayll. Its also wonderful to see classic Who playing around with the whole timey wimey thing in a way that new Who would later emulate.