The first 4 DVD The Doctors Revisited features a story featuring the first four actors to play Doctor Who: William Hartnell, Patrick Troughton, Jon Pertwee, and Tom Baker. The second DVD is The Tomb of the Cybermen with Troughton. The episode is available in the original fullscreen 4-parts or as a widescreen film. There is also a feature on the Doctor as played by Troughton. What is not mentioned is much of the first two years of Troughton's tenure as the Doctor was erased and there is little left.
The Tomb of the Cybermen is an excellent Doctor Who story. It is very imaginative and the plot twists are effective. The Cybermen are menacing even if they wear silver lame suits. The use of electronic voice boxes for their speech really makes the monsters work. The monosyllabic black manservant Toberman is a rather uncomfortable presence for a modern audience.
The Doctor and companions Jamie and Victoria (Frazer Hines, Deborah Watling) land on a planet where an archeological expedition has uncovered the tomb of the cybermen. Two members of the team, the Loigicians, think they are so smart they can command the cybermen but they are of course proven wrong. It seems the tomb was created by the cybermen as a trap only the best minds could open, minds they will take over. The doctor must save the team before it is too late.
Troughton's Doctor is quite a change from Hartnell's. The feature on his interpretation explains Troughton played the doctor as a comic figure who pretends to be less than what he really is so as to be underestimated. Jamie is a good companion but Victoria is a rather shrill damsel in distress in this story.