Buried Treasure

When Brian's dog finds a body, it prompts two people to confess to murder. It turns out that the body is over 600 years old, so Sandra, Jack, Brian and Gerry must discover why the pair took responsibility for a crime they couldn't possibly have committed and if they are the perpetrators of other killings.

Elsewhere, Strickland is rather keen for them to solve an even more tricky mystery that is closer to home.

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S04E07 - Father's Pride