Alex Jensen
Alex Jensen briefly served as Sheldon's research assistant on The Big Bang Theory. Instead of allowing her to help him, Sheldon plied her with busy work. Alex developed a crush on Leonard, but Leonard, refusing to betray Penny, turned her down.
Played by Margo Harshman
Margo Harshman's arc on The Big Bang Theory wasn't her only acting stint. Harshman was once a regular on Disney Channel's Even Stevens where she played Tawny Dean. Since 2013, she has played Delilah Fielding-McGee on NCIS.
Advertisement