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RA\u2019S AL GHUL GIVES OLIVER AN ULTIMATUM; DINAH LANCE PAYS LAUREL A VISIT \u2014 Nyssa (guest star Katrina Law) returns to Starling City and tells Oliver (Stephen Amell) that her father, Ra\u2019s al Ghul (guest star Matt Nable) has given Oliver 48 hours to find Sara\u2019s killer or the League of Assassins will start killing the citizens of Starling City. Laurel (Katie Cassidy) is stunned when her father (Paul Blackthorne) delivers a very special Christmas gift \u2013 her mother, Dinah (guest star Alex Kingston). Meanwhile, Ray (Brandon Routh) tries to make amends with Felicity (Emily Bett Rickards) and Oliver sets a meeting with Ra\u2019s al Ghul. Thor Freudenthal directed the episode written by Jake Coburn & Keto Shimizu (#309).\n