So...arguably the Worst episode list? OR the most divisive and controversial?
If so...

Controversial - on the boards:

1. The Pack
2. Reptile Boy
3. Go Fish
4. Dead Man's Party
5. Amends
6. Doomed
7. Where the Wild Things Are
8. Family
9. I Was Made To Love You
10. Spiral
11. Wrecked
12. Gone
13. Dead Things
14. As You Were
15. Seeing Red
16. Grave
17. Showtime
18. Get it Done
19. Lies My Parents Told Me
20. Empty Places

List of the worst episodes?

1. I Robot...You Jane
2. Out of Sight Out of Mind
3. Inca Mummy Girl
4. Reptile Boy
5. Some Assembly Required
6. Bad Eggs
7. Go Fish
8. Beauty and the Beasts
9. Amends
10.Beer Bad
11. Where the Wild Things Are
12. Family
13. Spiral
14. All the Way
15. Wrecked
16. Older and Far Away
17. As You Were
18. Showtime
19. First Date
20. Empty Places