|2nd Doctor on the left, 3rd Doctor on the right|
I think "The Three Doctors" is a good episode for those who aren't familiar with classic Who. Not only are there three different Doctors, but there is also a big UNIT presence in this episode. The United Nations Intelligence Taskforce (what it stands for in classic Who) is a major part of Pertwee's adventures. For most of his time as the Doctor, the third Doctor was stranded on Earth by the Time Lords, so he acted as a scientific advisor for UNIT. Brigadier Lethbridge-Stewart, the head of UNIT, is great in this episode. Nicholas Courtney, the actor who played the Brigadier, used to ad-lib lines to inject more humor into the role. There is a debate over whether the Brigadier counts as a "companion" to the Doctor. I don't think he is. He isn't a sidekick to the Doctor. He is the Doctor's boss, as much as anyone can be the Doctor's boss. He doesn't usually travel in the TARDIS with the Doctor, although he does in this episode. The Brigadier is a great character and one of my favorites from classic Who. When the Brigadier steps into the TARDIS, he doesn't have the normal reaction of shock that it is bigger on the inside. He looks around and makes a crack about how this is how the Doctor is spending so much of UNIT's money.
|left to right: the 2nd Doctor, the Brigadier, Jo Grant|
"The Three Doctors" is an outstanding episode of Doctor Who. Sure, it has some questionable special effects and weird looking monsters, but that's just classic Who. I didn't even mention the creatures that look like red bubble wrap. "The Three Doctors" is not just funny and entertaining. It also clues the viewer in on some of the history of the Time Lords and their ability to travel in time. To me, this is a must-see episode of classic Who.