Helmer Lesli Linka Glatter has joined Fox’s “Ride-Along” as a co-exec producer and producing director of the gritty Chicago-based cop drama.Glatter is a highly sought-after TV helmer who earned the DGA’s TV kudo earlier this year for directing the “Guy Walks into an Advertising Agency” seg of “Mad Men’s” third season (the one where the guy’s foot gets cut off by a lawn mower). “Ride-Along,” which follows Chicago beat cops, hails from 20th Century Fox TV and exec producer Shawn Ryan. Glatter will work on the ground in Chi. Glatter’s recent credits include a number of other “Mad Men” segs, as well as episodes of “House,” “ER,” “Weeds,” “The Mentalist” and the pilot for “Pretty Little Liars,” which bowed strongly Tuesday on ABC Family. Glatter is repped by WME.