HAPPY ENDINGS – “Makin’ Changes!” – Jane convinces Penny to stop changing herself for every guy she dates, and instead to change the guy to suit her needs. Penny’s first experiment — Jeff (guest star Ryan Hansen), a slacker who is 30 going on 20. Meanwhile, when Brad overhears Jane bragging to Penny about how she completely made him over after they met, he rebels, and starts walking, talking and dressing like his college-era self. And Alex and Max stage an “in-T-vention” to stop Dave from his obsession with v-necked T-shirts, on “Happy Endings,” WEDNESDAY, JANUARY 18 (9:31-10:00 p.m., ET) on the ABC Television Network. – (ABC/VIVIAN ZINK) ELIZA COUPE, DAMON WAYANS JR.