Conan O’Brien Says He Won’t Host ‘Tonight Show’ Following Leno. I can’t think on anything more screwed up than the position NBC has put itself in, and I fail to understand how they haven’t fired their head of programming. To screw around with the traditional Late Night timeslot in order to accommodate Leno is sort of like chopping off your own foot because you think your knee might walk better; you’re never recovering from that. What a bunch of retards.