For years I always thought Tom Baker was the best Doctor, hands down. But I'm getting to really like David Tennant. He may be the best actor to play the Doctor-- not that many talented people haven't been in that role, but he just seems to incorporate the best of all of them. He's so believable in the role, and truly likable. The best assistant ever, is of course, Sarah Jane Smith. I love that they brought her back-- the connection between the new episodes and the old show is awesome.
Peter Cushing was my fav doctor but he was in the movie so i will say Christopher Eccelston as the series doctor who.
The sonic screw driver is the best assistant , because it always helped out in sticky stituations ,never got the way or spoke back !!
The very powerful and the very stupid have one thing in common. Instead of altering their views to fit the facts, they alter the facts to fit their views... which can be very uncomfortable if you happen to be one of the facts that needs altering.