Numbuh 1, Numbuh 5 and others in “Unfinished Business”

Numbuh 1

Look at this list! We'll never get enough of these things to win! Might as well just quit now.

Hello? Has anybody seen Numbuh 1 around here? 'Cause this guy definitely isn't here.

Sure he is! Look, he's got the bald head, and the glasses...

...and he's talking about giving up! That's not the Nigel Uno Numbuh 5 knows!

Then who is it? Cause he looks like Numbuh 1 to me!