http://www.fox.com/watch/twentyfouren-ushttp://www.fox.com/watch/twentyfour/79705144001Jack calls in a favor to an old friend.2010-04-26http://media.fox.com/media/progressive/51296410001/51296410001_79904035001_ari-origin06-arc-132-1272074283115.jpg?pubId=51296410001http://www.fox.com/watch/twentyfour/82197436001Jack stops at nothing to avenge the death of his partner Renee Walker.2010-05-03http://media.fox.com/media/progressive/51296410001/51296410001_82547994001_ari-origin08-arc-155-1272846790623.jpg?pubId=51296410001http://www.fox.com/watch/twentyfour/83605923001Jack uncovers an unexpected lead.2010-05-10http://media.fox.com/media/progressive/51296410001/51296410001_83771480001_ari-origin05-arc-113-1273268184548.jpg?pubId=51296410001http://www.fox.com/watch/twentyfour/85982242001Jack is on a mission to uncover the truth.2010-05-17http://media.fox.com/media/progressive/51296410001/51296410001_86151378001_ari-origin08-arc-171-1274138055661.jpg?pubId=51296410001http://www.fox.com/watch/twentyfour/87338776001The iconic clock stops ticking as the series reaches its historic conclusion.2010-05-24http://media.fox.com/media/progressive/51296410001/51296410001_87688214001_FOX-24-8AFF23-24-145x80.jpg?pubId=51296410001