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In celebration of the NBC drama’s 200th episode on Wednesday, Oct. 8, the original cast member will make his long-awaited return as Dr. Will Halstead. A promo released after the Season 11 premiere sees Halstead stumble into Gaffney carrying an injured person.

It’s unknown how many episodes Gehlfuss will appear in, but TVLine has confirmed it’s more than one. (Watch promo above.)

Gehlfuss starred as Dr. Halstead from the series premiere in 2015 through 2023, leaving after the Season 8 finale. We last saw hi

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