“A WILDERNESS OF ERROR”

(FX at 8 p.m., Friday, Sept. 25) Either you’re the kind of person who still cares whether Jeffrey MacDonald murdered his wife and daughters in 1970 or you aren’t — but the sensational details of the case have ensnared some fine writers and filmmakers in the past, including Errol Morris, whose book about it provides a launching point for Marc Smerling’s five-part docuseries. There are hints of new leads that might show MacDonald (still serving time at 76) didn’t do it. “It’s a case that resists definitive explanations,” Morris says, by way of a huge understatement. Consider yourself warned.