Neil Patrick Harris was on Captain Planet?!
Apparently every actor I ever knew has been on this show at one point or another.
During his years as Doogie Howser M.D. it appears that he made a cameo as a one Todd Andrews in episode 63 – A Formula for Hate. Craziness. While looking this up to verify it, I happened upon many other names you may remember that were on this show. Elizabeth Taylor was Todd’s mother in episode 63, and the main cast had everybody; Whoopi Goldberg, LeVar Burton, and Jeff Goldblum amongst others.
Here’s the IMDB showing the entire cast.
And for kicks and giggles, here’s a NPH video from Sesame Street.