In surprising news, Patrick John Flueger, who plays Adam Ruzek on "Chicago PD," has announced a leave of absence from Season 13. His temporary departure was not preplanned, so several scripts will have to be reworked to explain where Adam has gone. The actor will apparently return before the season ends, but there's no word as to how long the absence will last.

Fleuger wouldn't be the first One Chicago actor to take a sudden break from one of the NBC franchise's popular hits; Taylor Kinney left "Chicago Fire" for 10 months across Season 12 of the drama, leading to difficulties developing in Kelly Severide's (Kinney) marriage to Stella Kidd (Miranda Rae Mayo), when Kelly disappeared out of the blue.

Sources claim this temporary departure comes in concert with difficulties going on in the

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