在这一季里面，齐天杰克·鲍尔（基弗·萨瑟兰 Kiefer Sutherland 饰）戒掉了在第三季中染上的毒瘾，齐天并且离开了CTU而开始为国防部长工作。但是杰克始终摆脱不了与CTU的联系，剧集一开始一场恐怖袭击致使的列车出轨事故使CTU不得不召回杰克进行此事的调查。才深入调查此事没多久，杰克就发现恐怖分子的下一个目标就是国防部长。经过杰克的努力，好不容易解救了被绑架的国防部长，化解了这次危机。原本以为可以松一口气的杰克，却发现刺杀国防部长只是恐怖分子设置的一个扰乱CTU调查的小环节。恐怖分子的真正目的是控制全美国的核电站，通过让核电站超负荷运转引起核泄漏进而威胁全美国，危机这才真正上演……
回复 :
回复 :小伙穿越成古代王爷，最美公主居然上门堵婚，陪嫁丫鬟还是十名女将！太刺激了！！
回复 :The ship has been stuck in the doldrums for some time, but as soon as they break free into more promising water, the wind blows up suddenly, damaging the foremast and sending the ship right back into the still water. Mr Prettiman takes a hard fall and is laid up in his cabin, Miss Granham tends to him and the two announce their engagement.A ship is sighted in the distance. As everyone prepares for the encounter with the enemy Edmund hits his head. He is badly hurt, but struggles on. The ships draw close, but instead of bringing an encounter with the enemy, it is The Alcyone, a British ship captained by Sir Henry Somerset, they announce that the war is over.The two boats are tied together for a ball. Edmund meets Sir Henry's ward, Marion, and immediately falls in love. But his head injury takes its toll and he falls unconcious just as he was going to beg for her hand. After some days he finally recovers, but the two ships have parted and Marion is gone.Edmund's servant Wheeler was on board the Alcyone. He had spent four days in the water after going overboard and had finally been spotted, rescued by the crew and eventually returned to the original ship. As they sail on, there is yet more damage as part of the keel falls from the ship. The passengers start to panic, convinced it will sink. Edmund finds Wheeler in his cabin with a gun, after his last scrape with death he is terrified of drowning, and he shoots himself.一个有点可笑的年轻人在探索世界的同时自己也得到了成长。
