THE BACHELOR - "Episode 1503" - Tensions are already mounting among the 17 remaining bachelorettes and resentment runs high when it's revealed there'll be two special one-on-one dates - each with a rose at stake - and a group date. And once again, some women will not get a date at all. An emotional Bachelor makes some personal inroads with the help of his therapist, letting him be more vulnerable with the women. However, one mysterious bachelorette makes a stunning departure that throws Brad for a loop and leaves the women in shock, on "The Bachelor," MONDAY, JANUARY 17 (8:00-10:01 p.m., ET), on the ABC Television Network. (ABC/RICK ROWELL) BRAD WOMACK, JACKIE