Actually, by tuning in a few hours earlier – beginning at 6 p.m. ET – you can get up to speed on all the Doctors leading up to tonight’s new special saluting the Fifth Doctor, Pete Davison. (Salutes to Doctors 1-4 are repeated in half-hour installments from 6-8 p.m. ET.) The Fourth Doctor, the popular Tom Baker, was a tough act to follow, and Davison inherited the role with a different approach entirely. This special shows how – then shows some episodes from his original 1981-84 run, including that decade’s interpretation of the Cybermen (pictured).