sentences:  An episode in Season Three where Jack is ordered by a terrorist to kill a colleague of his is often regarded as one of the best episodes of the series, and the second highest rated episode by fans on IMDB.com (behind the Season One finale).Season Four was met with positive reviews.While many critics and fans argue that it is weaker than the first three seasons, the show won many new fans due to a new timeslot, uninterrupted season, and a two-night four-hour premiere.