Exclusive Chicago Fire Video: Enemy Detective Voight Returns -- Is Casey in Danger?

On tonight’s Chicago Fire (NBC, 10/9c), dirty detective Voight (guest star Jason Beghe) is back to cause drama for — and inflict harm on? — Casey.

Keeping some distance from the crooked lawman is key, but the following exclusive first look suggests that it may prove difficult for the firefighter to not get dangerously entangled with the man who almost had him killed.

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“He’s dirty, but he ain’t stupid,” Det. Antonio Dawson assures Casey. “There’s no way he’s going to come after you again.”

But Casey’s not so sure. After all, “that’s what they told me right before he tried to have my skull cracked open,” he points out.

Press PLAY to watch the sneak peek and then hit the comments with your thoughts.