The epic War Games story is Troughton's last episode, it also heralds the final episode shot in black and white, and is also the end for companions Jamie and Zoe. As a massive fan of Pat, I find it a hard watch, the injustice he faced up against his own people The Time Lords. The mystery of The War Games is virtually over, the only real hangover is the trial of The War Lord, Philip Madoc puts in a good showing, but the whole episode is really focused on the Doctor's farewell. The best bit for me has to be The Doctor's evidence to The Time Lords, recounting the various foes he took on and defeated, nice scenes of Yeti and Daleks. Both companions also get a nice send off, both Fraser and Wendy were good servants to the show and get rather good closing scenes. Maybe The Time Lords were more celestial beings in this episode then they would later appear, particularly in The Tom Baker years.
The episode is fascinating in that it explains The Doctor's origin, and delves deeper into the concept of regeneration. This episode serves as the end of Doctor Who in the 1960's, when it returned we'd get a new Doctor, new companion and colour.
Patrick Troughton and co. thank you for the magic.