An explosion at a wedding ceremony sends a stream of injured partygoers into New Amsterdam.

While Max and Dr. Wilder scramble to find a rare blood type to save the groom, Reynolds and Bloom treat a couple with bizarre injuries.

While helping a young girl out of a catatonic state, Iggy learns the truth about the wedding. 

Air Date: Tuesday, Oct. 4 at 10 p.m. ET/PT on NBC.


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NEW AMSTERDAM -- "Big Day" Episode 503 -- Pictured: John Earl Jelks as Horace -- (Photo by: Ralph Bavaro/NBC)