Magpie, Follyfoot, and Black Beauty from my childhood.
Upstairs Downstairs, and All Creatures Great and Small.
Cagney and Lacey, Hill Street Blues.
Obviously, the soaps.
Shetland, Vera, Detectorists, Happy Valley, Life on Mars, Ashes to Ashes, Line of Duty.
Maybe not catchiest but stirs most memories for me.