Re: Locked: Barbara G./Superboy
The first Robin was Dick Grayson. He's sort of the default Robin for most universes. He's older now.
The second Robin was Jason Todd, who is now the Red Hood. He's the guy going around blowing stuff up and taking his problems out on gangsters.
The third...well I guess it was Tim Drake. Tim was never a Robin where I'm from, but he is in most other places. He's not here, so you don't have to worry about him just yet.
The fourth is Damian Wayne, the Robin we have now.
Also, I think Stephanie, Helena and a few other women were Robin as well, though I've never encountered them as such.