12 - Er - Season

: After years of using a cane, Weaver undergoes successful hip-replacement surgery and no longer requires it by the end of the season.

: The series expanded its scope with a multi-episode arc in Darfur, Sudan. Dr. Carter and Dr. Pratt (who travels there on a relief mission) face the brutal realities of medical care in a war zone. ER - Season 12

: Michael Gallant returns from Iraq to marry Neela Rasgotra, but his subsequent return to the war zone leads to one of the season's most tragic conclusions. Major Cast and Characters : After years of using a cane, Weaver

Season 12 of ER (2005–2006) marks a significant transitional period for the long-running NBC medical drama , serving as the first full season without original lead Noah Wyle (Dr. John Carter), who moved to a guest-starring role. The season is defined by a shift in ensemble leadership, geopolitical storylines, and several high-stakes character arcs. Carter and Dr

The season features a stable of series regulars that anchored the show’s later years:

: Luka Kovač and Abby Lockhart become the show’s central focus as they rekindle their relationship and navigate Abby’s unexpected pregnancy.