Once upon a time - Promotional stills

ONCE UPON A TIME - "What Happened to Frederick" - With their love for each other growing stronger, David finally agrees to tell Kathryn about his relationship with Mary Margaret and put an end to his loveless marriage. Meanwhile, in the fairytale land that was, while runaway groom Prince Charming searches for Snow White, he agrees to aid Abigail on a dangerous mission to recover something precious that was lost to her, on "Once Upon a Time," SUNDAY, FEBRUARY 19 (8:00-9:00 p.m., ET) on the ABC Television Network.