It's an all-out Zack attack as the Black Ranger takes on the villainy of Rita Repulsa and Lord Zedd in two exciting episodes! Adventure 1: It's the Black Ranger's birthday and everyone has a gift ... even Rita Repulsa. She's sent a new monster -- the Dark Knight -- to say happy birthday, Zack. Will the Power Rangers be able to band together to blow out the candles on this... see more