S4·E1 The Real Thing (1)

Alex implements a fail-proof, and extremely unromantic, method of meeting the girl of his dreams: He picks her from pictures in the freshman directory. His selection, Tricia, seems to fit his requirements perfectly, but his plan goes off-track when he is strongly attracted to her roommate, Ellen. Ellen and Alex dislike each other instantly, and though he can't figure out why, he finds himself thinking about her constantly.