when aldo is killed by agent alexander mahone (william fichtner), michael and lincoln decide to confront "the company" and the conspiracy, and bid farewell to sucre, who alights the getaway plane to mexico. after a brief capture by mahone, michael and lincoln are aided in their escape by paul kellerman (paul adelstein), who turns against the company in an act of self-preservation. kellerman takes them to terrence steadman, the man lincoln is accused of murdering. steadman's suicide forces michael, lincoln and kellerman to find sara since she holds the key to unlocking information that can expose the conspiracy. after sara joins them, michael, lincoln and kellerman head to chicago, where sara's father has hidden the information. on the way, sara tells michael that she has fallen in love with him and later in the same episode michael reveals that he feels the same.