I love season 4 and part of that is just because it's the first season I watched. I definitely don't rank season 1 so high, it had a "temporary amnesia" plot ffs. Honestly a lot of the choices they made with Teri Bauer in general were just weird, weak writing.

Season 6 remains at the bottom for me. It started so good. I remember after episode 4 there was a commercial to own the first for episodes of the season on DVD straight away, and I thought that was really weird; until I saw the rest of the season. I think they knew the rest of what they had was a dud. It didn't have to be; meeting Jack's family, Assad, the attack on CTU, Audrey... there were good components but they were just a god damn mess.

I think I'd rank them 5, 3, 4, 2, 8, 7, 1, LAD, 6