it began in 2004, when conan o'brien, leno's young heir apparent, threatened to leave and go to fox ifomise to give him "the tonight show." the network agreed to what it hoped would be an orderly succession plan in which conan would replace leno in 2009. leno was one of the last people to find out. >> leno: first time, i got blindsided. >> kroft: what did they tell you? >> leno: oh, "you're out. you got... you know, going to go with this and ba, ba, ba." "oh, okay." and i went, "okay." >> kroft: "you're out. you're fired. you got four more years." >> leno: yeah, that was basically it, sure. >> kroft: did you ask them why they had decided to do this? >> leno: no. >> kroft: you didn't? >> leno: no. i mean, "why?" no. ( laughs ) >> kroft: no, i don't mean like..." >> leno: "why?" >> kroft: no, i mean-- >> leno: "why are you doing this?" >> kroft: no, i mean, kind of like, "okay, so why? what's the..." >> leno: you know, you have a girl says... >> kroft: "...logic behind this?" >> leno: "...i don't want to see you anymore." "why?" you know? she doesn't want to see you anymore, okay? >> kro