Pretty self-explanatory. Have at it.
Season 4 of mad men
Season 3 of Hannibal. The Red Dragon arc was better than anything in the fabled season 2, while I’ve never seen TV with the quality of cinematography the Florence half of season 3 had.
S2 of Breaking Bad
Season 4 of the Wire and Season 4 of Seinfeld
Season One of Homeland. The single greatest season of television I’ve ever seen.
Lost season 1
Breaking Bad Season 5
Season 5B of Breaking Bad.
Plenty of great choices here. My pick is Lost season 3 (probably because there was a lot of Juliet, my favourite character)
Season 4 of The Wire, though Season 3 is very close behind.
The Leftovers Season 2
Season 2 of Arrested Development