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|Season 4, Episode 15|
|Episode Guide Transcript|
For Better Or Worse
Ab Initio is the fifteenth episode of Arrow Season 4 and the 84th episode overall.
BIRTH OF THE PHANTASM- Having captured Andrea, Oliver tries to reason with the young woman and dissuade her from her path of vengeance only to sympathize with Andrea's tragic backstory. Malcolm receives an ultimatum from Abbot. Diggle defends the people of Corto Maltese against the remaining H.I.V.E. agents and is unexpectedly rewarded. Nyssa and Oliver butt heads on how to proceed with Andrea while Laurel takes a day to spend with a disturbingly serene Sara.
- Stephen Amell as Oliver Queen
- Katie Cassidy as Laurel Lance
- David Ramsey as John Diggle
- Willa Holland as Thea Queen (credit only)
- Katrina Law as Nyssa al Ghul
- Caity Lotz as Sara Lance
- Deborah Ann Woll as Andrea Beaumont/The Phantasm
- Colin Donnell as Tommy Merlyn (credit only)
- and John Barrowman as Malcolm Merlyn/Ra's al Ghul
Special Appearance ByEdit
- Neal McDonough as Damien Darhk (flashbacks)
- David Morrissey as Julian Mercer (flashbacks)
- Cynthia Addai-Robinson as Amanda Waller (flashbacks)
- with Maria Valverde as Carlotta Rivera
- and Josh Lucas as Kyle Abbot
- Antagonists: Damien Darhk, Kyle Abbot
- The episode's title is Latin for "In the beginning".
- Thea and Tommy do not appear in this episode.