This thread is about shows you started watching late into or after their run.

I started watching Scrubs during season 7 and I don't even remember what got me into it in the first place.
I watched the first season of Buffy more than 10 years after it aired.
I started watching How I met your mother in the middle of the 4th season.
I'm sure there are more but that's all I can think of right now.

Obviously you can elaborate as much as you want about a given show and what got you into it and so on, I just chose not to.