I don't know how far I'll get, as it's a seven part story, but I'll try to watch at least four parts. (Maybe five)

It has Liz Shaw in it, so it's guaranteed good.

Series most underrated companion.

Episode 5 has an extended version on this set, but I'll watch the broadcast version.

I'm so used to the opening being a certain way that the change in this episode (with the theme song being interrupted by an erupting volcano) threw me off.

Liz Shaw's great so far; shame she was only in four stories. (Though I've heard her used in a Big Finish story with the actress's daughter playing her)

Wasn't expecting this episode to involve primordial volcanic ooze that turns humans into cat-people.

"Phrases never said in the English language until Doctor Who came along, No. 105"

Haha yeah.

Also, the Doctor transported himself to an alternate timeline or another universe by messing around with his TARDIS console, and I don't like the look of the logo that's plastered on doors and uniforms.

The Brigadier's dramatic spinning chair reveal was great. (Complete with eyepatch, scar, and strangest of all, no mustache!)

Surprised it switched focus back to the main universe - I figured it would stick to the universe that the Doctor is trapped in until he returns to the main one.

Episode 4 ends with a really effective cliffhanger. I'll stop here and watch the last three episodes (and find out what happens when the countdown hits zero) tomorrow.

Picking up where I left off. I'm curious if this is going to be something quasi-realistic, like the digging operation causing a chain reaction of volcanic eruptions, or if it's going to go sci-fi nonsense like "you've angered the lava people who are living near the Earth's core!"

Kind of sad that the Doctor has to admit that the alternate world can't possibly survive the aftermath of Stahlman's experiment.

I find it funny that the Doctor canonically knows who Batman is, but didn't know that Superman was Clark Kent (and presumably didn't know about Superman) until he was the 12th Doctor.

I'm on to episode 7; that was fast.

And the Doctor transported himself back to the main universe off-screen. That was unfortunately abrupt.

When the Doctor said "Only one thing to do... Reverse...", I was half expecting him to say "Reverse the polarity of the neutron flow."

Finished! The ending scene was nice; it kind of felt like Jon Pertwee was channeling Patrick Troughton. (At least, I could see Troughton saying similar lines)