Jack goes off to establish custody of Jackie, Jr. Carly is about to take a pregnancy test when Emily comes over. Emily encourages Carly to go ahead with the test but notes her disappointment when the result is positive. Carly urges Emily not to tell Jack shes pregnant and later admits to her that the baby may not be his. Molly and Mike baby-sit for Jackie, Jr. while Jack goes to court. After Mike gets over his initial uneasiness caring for the baby, he asks Molly if she might want to have a child with him someday. Lucy, Aaron and Alison are at a Vanderbilt University frat party when Hal finds them. Craig and Holden arrive on campus as the partygoers waylay Hal, giving the teens time to escape. Holden and Craig are looking for Hal when Holden sees Aaron pulling out in his car with Lucy and Alison. Craig and Holden follow their car. Ben notices tension between Isaac and Bonnie and tries to find out whats up. Isaac and Jessica both deny there is a problem, but Lisa agrees Isaacs behavior has been strange and that Marshall Travers seems to be behind all of Isaac and Bonnies troubles. Bonnie suggests to Margo that they sting Marshall by trading him the cape for the videotape of Jessica and Marshalls tryst. Later, Ben walks in on an intense moment between Bonnie and Marshall. (thetvdb.com)