5. Fifth Doctor Caves of Androzani (Amazon Prime, Netflix)
Widely regarded as the best story of the old series, it is also the last for the Fifth Doctor. He and his companion, Peri, who had joined him in the previous story, are really at the top of their game here, and make one long for more stories featuring them (something we got with Big Finish). Its even directed by Graeme Harper, who went on to direct some of the better new series stories. The story itself is excellent, full of Shakespearean notes, corporate greed, not one, but two, wonderful villains and a great, touching regeneration sequence. For those of you with Netflix, its also your only chance to see the Sixth Doctor. Really, this is an incredible story that has aged very well.