Gerry chewing out the misogynistic Fred Blackledge, in a magnificent "Reason You Suck" Speech, in 'Left Field'. Considering that he was reading the man's books and agreeing with many of the points. Sandra approved.
In the beginning of the same episode, Sandra chasing down some skinheads in her car, and then arresting them, simply because they accidentally egged her freshly cleaned jacket.
In the Series 6 episode 'Meat Is Murder' the team meet Gerry's extended family in Smithfield Market. At first the two main cousins Sid and Barry come across as a Plucky Comic ReliefThose Two Guys duo until the reveal that they, their father and Gerry's father Norman along with other stallholders delivered a No-Holds-Barred Beatdown on a loan shark who had threatened Gerry.
Danny effortlessly taking down an aggressive, much-larger-than-him teenager in the series 11 opener.
Small, but in 'Nine Lives' when the investment banker confesses to having a mental breakdown, Gerry is quick to tell him he isn't weak.
Also, all the Brian and Esther bits in 'Old and Cold'. Brian really does care about her.