Good question. I love most of them, but I really love these ones (not in order):

1, Coldhearted

2, Misplaced

3, Agendas

4, Failsafe

5, Disordered

6, Terrors

7, Bereft

I’m only going to list episodes from season one because I can’t remember the individual episodes of the other seasons. Those episodes kind of blended together into one. I’ve seen season one the most, so I remember it more clearly.

1. Independence Day

2. Fireworks

3. Usual Suspects

4. Auld Acquaintance

5. Depths

6. Darkest

7. Tale of Two Sisters

8. The Lady, or the Tigress

9. Private Security

10. Death and Rebirth

Honorable Mentions: Homefront, Over and Out, Nautical Twilight, Dropzone, Coldhearted, Insecurity, Summit, Endgame, True Heroes, Antisocial Pathologies