Here is what passes for metanarrative on CBS. The new Matlock “reimagining” of the classic 1984-1995 show, resuming Oct. 17 after its Sept. 22 “sneak peek,” takes place in a world in which the Andy Griffith original still aired. Booyah! Take that, Gramps and Gran! But wait, there’s more. The new series looks at the opioid crisis, #MeToo, and police misconduct, among other shopworn political concerns. If this baby were any more 2017, it would star Meghan Markle.