William Hartnell, Patrick Troughton, Jon Pertwee, Tom Baker. Doctor Who celebrates its 50th anniversary (1963-2013) and its status as the longest-running sci-fi show in history with a collection of its greatest shows. This edition features some of the best episodes with the first four Doctors, including: "The Aztecs," "Tomb of the Cyberman," "Spearhead from Space," and "Pyramids of Mars." Each episode features an introduction by Steven Moffat. 4 DVDs. 1963-1981/color/6 hrs., 33 min/NR/fullscreen & widescreen.