The show peaked with Pertwee, and it’s been downhill ever since.
OMG I was about to say “Bring back Jon Pertwee...from the dead.”
Aw. I grew up with the Fourth (Tom Baker). Not a big fan of subsequent regenerations though.
Turning “The Curse of Fatal Death” serious is their biggest error, obviously; it makes the Sixth seem forgivable.
Many Episodes with Pertwee not available on iTunes are available using Britbox on Amazon. $7 month after 7 day free trail.
With the end of Season 18 and the demise of the 4th Doctor, the show when into a steep decline until the 9th Doctor which began with far better writing and superior special effects - attributes lacking in the early episodes with Pertwee. Script writing after the relaunch in 2005 became more creative and generally interesting. But PC-ness began its slow creep into the fabric of the show, unobtrusively at first, then with the demise of the 11th Doctor in 2015-16, the audience got hit full force with British PC-ness.
With the arrival of the 12th Doctor the writing became a jumble and the inclusion of a ugly, openly gay, black female, the show was on water skis headed to the ramp, not to mention making the Master a woman. With the 13th Doctor, the show left the ramp and soared over the shark, landing with a thud of lowered viewership.
Tom Baker.