"A Game of Cat and Mouse" has him mention that Halawa Corrections is his favorite resort.
A horrified Higgins finds Jin (crashing at the manor) playing a game of pool...naked. And his saying she's "fighting your animal attraction to me."
At a house, Higgins is held at bay by an angry dog. After so many bad times with her Dobermans, Magnum can only laugh hysterically at how Higgins now knows exactly how it feels to experience that. He even takes photos of it.