Hmm.
Gotta keep in mind that, in reality, it's the Sean Show.
He can't really entertain a sidekick, as well meaning and as buddy-buddy as he and Colmes profess to be, who could possibly upstage him. So it's best to put on a vapid skirt who is easy on the eyes and therefore in keeping with a steady diet of the infamous Fox Babes.
It'll be a smash hit.

Oh, and Colmes apparently is married to a woman with a Ph.D.
Piled High and Deep.