Even if The Donald flounders, he is down for at least one more "Apprentice" after this one (this will be the LA "Apprentice"), so don't count him out yet.
As for "DOND," I don't think its audience and "Prison Break"'s are the same, so they may not hurt each other. It could do damage on the lesser hour of the CBS sitcom block, but I could see it really doing damage on "Wife Swap," the only decent ratings performer ABC has on Monday night, what with "Emily" and "Jake" gone and "The Bachelor" treading water and playing out its contract. Howie should be happy he's not on at 9, where if "24" didn't kill him, "Two-and-a-Half Men" would.