Reddit reviews Doctor Who: The Tomorrow Windows (Doctor Who (BBC))

I don't think the Last Great Time War should ever be shown. It's better left to the imagination. That said, here are some good ways to get your Paul McGann fix:

• Big Finish monthly audios. Eight's storyline in the monthlies is mostly continuous, with some one-off episodes more recently. Very plot-heavy. If you want a mostly standalone intro episode to see if you like it, check out "The Chimes Of Midnight": one of the most well-loved episodes in all of Doctor Who.
  
• Big Finish New Eighth Doctor Adventures. Same continuity as the monthlies, just takes place later. There are four continuous seasons so far and a fifth one coming out in November. Also very plot-heavy, with very few standalone episodes. "Max Warp", "Immortal Beloved" and "Phobos" are great introduction episodes if you just want a taste of what the series is like.
  
• Eighth Doctor Adventures. The novels. Explicitly said to take place in a different timeline from Big Finish (although there are a few exceptions and crossovers). I like "The Tomorrow Windows" as an introduction.
  
• "The Forgotten". Has a great little bit in it where Eight reluctantly prepares for the Last Great Time War.
  
  Have fun! :)