Easy,

10: Love And Monsters or Waters Of Mars

12: Heaven Sent

Before anyone else let’s get Midnight out of the way. An absolute masterclass in writing from RTD and my personal best episode of Doctor Who.

Tennant

1 • Human Nature/The Family of Blood

2 • Midnight

3 • 42

Capaldi

1 • The Return of Dr. Mysterio

2 • World Enough and Time/The Doctor Falls

3 • Thin Ice

These aren't necessarily in order. But all of series 10 is brilliant except for Knock Knock (still good), The Lie of the Land (terrible), and Empress of Mars (somewhere in between).

The Stockbridge Showdown

Hmm… Tennant is pretty hard, but I have a few for Capaldi. Flatline and Time Heist are my two favorite episodes of all time, and Heaven Sent is of course a classic.

For Tennant, I’m sure most people can appreciate The Waters of Mars, although that is when 10 slowly starts to spiral. Silence in the Library/Forest of the Dead is spectacular, especially after seeing River’s plot unfold during the Smith era. And Blink is pretty good, but in my opinion it best on a first watch.