Grandpa wants to exchange russian defense chip for Josh-he convinces the VP to do so-CTU takes Josh and arranges for the exchange, Doyle takes josh to meeting point. Jack finds out and tries to convince CTU that his father will not hold up his end of the bargain-Karen Hayes agrees and convinces Buchanan to ambush the truck Jack is transported in, and they head out to the rendezvous. Meanwhile, Grandpa sends 2 guys by boat to do the exchange, but the chip is fake and blows up in Doyles face-they take the kid away. Jack/Bill get there, hijack a chopper to head after the bad guys. Jack tells CTU to check for oil rigs on the ocean near by as that is probalby where they are headed. White house determines the chip is on the rig, and decides to blow it up to finally destroy-Russians agree that would be acceptable. Jack/Bill get to the rig, kill tons of people, rescue the kid, arrest Chang, and fly out just as F-18's blow rig apart. (Jack hanging on ladder from chopper). Grandpa apparently killed in explosion (had been shot by the kid earlier). As chopper heads to shore, jack falls from ladder into water, waves Buchanan away. Back at the white house, Russians see the explosion and are satisfied, adn Lennox convinces VP to release Hayes from custody and allow her and Bill to resign/retire Jack heads to Audreys fathers house-screams at him-says his goodbyes to Audrey who appeared to be in a coma, and walks out-holding a gun and looking over the cliff to the water below (I thought he would either shoot himself or jump). fade out. Also in that mix, Chloe collapses at CTU and finds out she is pregnant.
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Best QB Ever. Worst Defense Ever.