Sherry Stringfield is one of "ER"'s original cast members, portraying Susan in Season 1 as an eager resident. Stringfield left the show, the character was not recast and Susan left County General Hospital and the series in Season 3, but Stringfield and the character returned five seasons later as an attending physician in Season 8. Susan Lewis eventually checked out of the ER for good in 2005, at the beginning of Season 12, having been passed over for tenure in favor of John Carter by Kerry Weaver. She was offered a tenured position at a hospital in Iowa City.