My old page for this was lost, and I don't know how many shows it might have listed. I know I want to see all of Toonami's Total Immersion Events (TIEs), at least a couple of which I saw when they first aired. Maybe that's all I had previousliy listed, or maybe it's not. Anyway... those shows include, in chronological order:

Lockdown
Trapped in Hyperspace

Then there were several I definitely never saw, which aired in the years after I lost access to Cartoon Network. I won't list them here, but I would like to see them someday.

Other microseries:

Wallace & Gromit's Cracking Contraptions
I saw this once, but my review has been lost, so I'll have to watch it again sometime.