Numbuh 2's name is Hoagie P. Gilligan.
You can watch Codename: Kids Next Door episodes on youtube, livevideo, or on the Cartoon Network website.
It ended because Cartoon Network only allows six seasons. And because the new person who runs the network thought it wasn't getting enough veiwers.
I don"t know but sector V's names are Numbuh 1,2,3,4 and 5
I think it's rated Y7.