Having tragically lost his wife at the hands of double-agent Nina Myers, Jack has retired from CTU and is in search of reconciliation with his daughter, who still is confused at the sudden loss of her mother. Suddenly, Jack gets a call from CTU who have discovered that terrorists on US soil have possession of a nuclear warhead and intend to use it before the end of the day. Back in his old job, Jack must struggle between his emotions to get revenge for his wife's murder and to save millions of lives from the imminent nuclear threat. Simultaneously, David Palmer, now President, faces a crisis of his own alongside the threat of the warhead, as members of his own administration set out to remove him from office.

A stunning second series, with every episode so full of twists each one feels like an M. Night Shyamalan film. Great performances all round. Elisha Cuthbert seems to drag her feet yet again however as Kim Bauer, but other than that, some great acting and heartfelt, tense storyline.