"ONCE UPON A TIME - ""Knightfall"" - Rogers strikes a deal with Eloise despite Tilly's fair warning, while Ivy struggles to find herself after Victoria's death. Meanwhile, in a faraway realm, Hook confronts Captain Ahab over a legendary magical talisman which can free Alice, only to learn that his quest may have unintended consequences, on ""Once Upon a Time,"" FRIDAY, MARCH 16 (8:00-9:01 p.m. EDT), on The ABC Television Network. (ABC/Jack Rowand) COLIN O'DONOGHUE"