This is the one where the Doctors fights himself, the master tries to help him, and the true villain was the timelord inside us all along. And Rassilon is a huge troll.
Full notes at noobsandthewhovian.com
This is the one where the Doctor and the Doctor and the Doctor and the Doctor and the Doctor and the Doctor and the Doctor and the Doctor and the MasterDoctor have an adventure with ALL THE COMPANIONS and Thirteen doesn't say goodbye.