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![](https://image.tmdb.org/t/p/w342/w6oHM0977ZG4qER3nZzA8CLPXRY.jpg)
A Little Knowledge (1)
Frank poses as a criminal when he goes undercover in an attempt to uncover an armed robbery operation.
![](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![](https://image.tmdb.org/t/p/w300/1hgwJ4thwRY67sU6ZjjhiSXApCn.jpg)
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Other episodes for this season
![As Fast As You Can](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![The Gingerbread Man](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![For Old Time's Sake](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![One For the Social Workers](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Sympathy for the Devil](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Bloody Kids](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Behind Closed Doors (1)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![The Long Haul](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Die For Me](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Old Dogs, Old Tricks](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Run for the Money](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![A Little Knowledge (1)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Double Play (2)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Soft Target](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Not Fade Away](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Romeo is Bleeding](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Heads or Tails](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Mocha Fudge](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Let the Dead](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Diminished Responsibility](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Watery Grave](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Six Hundred Clear A Week](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Untouchable](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Switchback](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Somebody to Love](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Epiphany](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Honour Amongst Thieves (1)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Trust (2)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![War Games (3)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Last Impressions (4)](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
![Old Bones](https://image.tmdb.org/t/p/w300/Zf6FI8EgdYQZ84wMwJpn8FiS1A.jpg)
Frank poses as a criminal when he goes undercover in an attempt to uncover an armed robbery operation.