When a troubled man makes his decision to jump Casey thinks fast even after being under the close eye of a substitute chief.

Season 6 Episodes 4 "An Even Bigger Surprise"
When Boden gets put on a morning detail assignment, a new chief takes over and begins to butt heads with Casey, Brett and Dawson in regards to Firehouse rules and decisions on calls. Later on, Casey receives surprising news from Boden. Meanwhile, Mouch, Otis and Hermann pull an elaborate surprise for Cruz by flying in Leon, Cruz's brother for his birthday. Also, Brett receives shocking news about her friend Hope.

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