These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ho Yay: Surprisingly, between Martin and PC Penhale. In the episode with Penhale's brother, Penhale runs around Martin's office and hugs the Doc while shirtless. Later that same episode, Penhale gives Martin a present and mentions their "special relationship."
Replacement Scrappy: Penhale in place of Mylow. While Mylow wasn't brilliant, he was still good at his job, friendly, and generally likable. Penhale is down another ten IQ points, narcoleptic, and unable to effectively do his job due to agoraphobia. He also introduces himself to multiple nicer characters by assuming they've committed some sort of crime.