FreshPrinceOfBelAir

The Zack Attack is back! Alas, it was for one night only.

Last night, Mark-Paul Gosselaar surprised Jimmy Fallon on 'Late Night' by showing up dressed as Zack Morris from 'Saved By the Bell' -- complete with giant mobile phone. Fallon's been obsessed with putting together a 'Saved By the Bell' reunion, and Gosselaar (who now stars in TNT's 'Raising the Bar') gamely agreed to participate -- if Fallon can get everybody else on board.

It got us thinking about which of our favorite '90s sitcoms need to hold reunions, like, yesterday. 'The Today Show' already hosted a 'Cosby Show' reunion, but here are some more meet-back-ups we really, really want to see: