Me: “Is this Big O?”

It is.

I always loved the mystery that this show managed to capture when I was a kid. Especially catching an episode here or there on cable TV. It often meant missing key plot points or not understanding how everything fit together. Watched it through as an adult and I still really like it. I won’t spoil the ending, but it’s one of the most ridiculous things I’ve seen. Not that it’s over the top, but the absurdity of it is something I still reference to this day.

Also the phone ringing to tell you the name of the next episode is burned into my brain

That blurb just sounds like Ghost in the Shell.

Literally the only thing I remember from watching when I was like 11 is the episode where a mad scientist puts a copy of his torso on a little go kart while it repeatedly shouts “Big O!” Into the wristwatch that summons it.