6x11 The Invasion Episode One
This is possibly the most blatant connection to Saturday's episode that I've done in this run of tie-in viewings, so if you don't know I'll leave you to look it up.
Also of note is that this is the first animated reconstruction of a missing episode that the DVD range ever did. I bought it on release back in 2006, to help support the notion of animating missing episodes, but this is the first time I've got round to watching it. Typical me. The animation is a little Flash-y, true, but a heckuva lot better than the mess that was The Reign of Terror.
2x16 There's the Rub [2nd watch]
Part 1 Eden
This was excellent. British drama often focuses on character at the expense of plot, so I was kind of expecting an hour of people moping around being miserable, but instead there was a good chunk of story, and plenty of mysteries set in motion -- which is good, because it's got to fuel another seven hours yet. If it can keep it up, it could be a future TV classic.
[Watch it (again) on iPlayer.]