So, what ep is Công chúa tóc xù heart? the 5th ep?

Depends on if bạn count Broken as one hoặc 2 eps. I believe TPTB officially counts it as 2. So Braveheart will be 6th.

According to cáo, fox and the House producers, Broken counts as 2 episodes, so it goes like this:

1 & 2: Broken
3: Epic Fail
4: The Tyrant
5: Instant Karma
6: Công chúa tóc xù Heart

Công chúa tóc xù tim, trái tim will be the 6th episode.