Doctor Who: Fifty, Going On Twelve

So, Doctor Who's 50th anniversary is coming up, along with a much-anticipated special episode with 2 to 4 Doctors in it, depending on how you count. I kinda want to do something special for it, but all I can think of is a marathon featuring each Doctor, and if I show complete stories, that comes to something north of 15 hours. That's if I can find 2-parters for each of the classic Doctors that are worth watching, which can't be done. Two-parters, by Doctor:

• First Doctor: The Edge of Destruction
  
• First Doctor: The Rescue
  
• Fourth Doctor: The Sontaran Experiment
  
• Fifth Doctor: Black Orchid
  
• Fifth Doctor: The King's Demons
  
• Fifth Doctor: The Awakening
  
• Sixth Doctor: Attack of the Cybermen (Most of season 22 was 2-parters, each part being 45 minutes.)
  
• Sixth Doctor: Vengeance on Varos
  
• Sixth Doctor: The Mark of the Rani
  
• Sixth Doctor: Timelash
  
• Sixth Doctor: Revelation of the Daleks

So, the 2nd, 3rd, and 7th Doctors never had a 2-parter. Seven had many 3-parters, but for Two and Three I'd have to show all or part of a 4-parter, and Eight, of course, had just the 2-hour movie. And, "The Sontaran Experiment" is hardly the highlight of Tom Baker's tenure. [sigh]
I could double-up. Show a good Tom Baker 4-parter (2 hours), then "The Five Doctors" (90 minutes), something short from Six (2×45minutes) and Seven (3×30 minutes), Eight's movie (2 hours), and one-hour episodes from Nine, Ten, and Eleven. That would be, hmm, 12-to-13 hours (allowing for reasonable breaks between), yikes. The first three Doctors kinda get shafted, too.

Any ideas?