The 3rd Doctor

"A young man in an old man- no, that's not it, an old man in a pastry chef's- a pantomime actor being a serial killer- errrrrrrr"- NPC print glitch

The worst doctor?
An opinion frequently peddled by people who have never watched more than 10 minutes of Classic Doctor Who is that Pertwee was the "worst" doctor, by whatever vague metric they can come up with.

"Formulaic writing"
The fixed setting of some of Pertwee's seasons enhance the feeling of repetiveness in stories. If only the rest of Doctor Who wasn't just as unoriginal and derivative.