Benton returns in the 19th episode of the 15th (final) season of "ER" in the episode "Old Times" which first was broadcast on 12 March 2009. In the episode he visits old friend and former student John Carter who is awaiting a kidney transplant, and it is revealed that Benton has left private practice for a surgical attending position at Northwestern University Hospital now that Reese is thirteen. He is seen wearing a wedding ring, so it is assumed he has married Cleo Finch who Benton states is at home watching Reese. Benton decides to observe Carter's transplant and Benton's insistence on being thorough, which annoys the surgeon, allows a complication to be resolved and the surgery to be a success.