The Watchers

Burton suffers a lingering form of vertigo due to his head injury after the robbery.
Nick and Burton continue to look for Shannon as Burton blames himself for her running away.

Burton and Nick while working with the authorities track Shannon down to a motel where they try to convince the woman who called the police to work with them.
The entire experience forces Burton to re-evaluate his ability to be a father to Shannon.

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S03E18 - The Bachelor Party