I'm indebted to this website for details of these volumes, which also includes an overview and episode guide here
The Seekers - murder in the boneyard [2013]
First story.
A young woman is invited by a new male friend to go to a private night club, the Boneyard. While there she witnesses him have an altercation with other patrons and when she tries to intervene, she is assaulted and ejected. Then she is the victim of a hit and run. In the hospital, her story is finally believed by a doctor who calls The Seekers. They will learn of a large gang of criminals specializing in all sorts of crimes who use the night club as their base.
The headmaster at a prestigious boys school has died and had a lovely funeral. Then a young student witnesses the man crawling from his unfilled grave. When another student later reports to the headmaster's matronly sister that she too saw the man after his burial, that sister contacts her old friend, Una, for help. Una puts Susanne Dove and Jacob Benedick on the case of locating a man seen the week before near a beach four months after he was buried!