The Wedding (S04E21)
A brash radio host stuns his audience with an unexpected announcement: Lewis reveals to Kellerman that he’s tying the knot later that evening, only to promptly vomit. Urged by excitement, he convinces his colleagues to assist with the last-minute preparations for the wedding. Meanwhile, Kay brings her sister along to the station, and with everyone occupied with Lewis's big day, Gee takes Howard to investigate a homicide linked to the talk-show host. Munch doubts the authenticity of the wedding, suspecting it might be a prank. As Bayliss and Kellerman compete for Kay's sister's attention, Gee fatally shoots a suspect, only to discover he had been incarcerated during the murder. The witness who implicated him admits it was a joke. Ultimately, Lewis's wedding is real, and during the celebration, Pembleton's wife unexpectedly goes into labor.