|Season 4, Episode 16|
|Episode Guide Transcript|
Light A Fire
For Better Or Worse is the sixteenth episode of Arrow Season 4 and the 85th episode overall.
FRIENDS BECOME FOES- When Sara's behavior takes a drastic turn for the worse, Nyssa takes her to the Glades, but Sara begins terrorizing the district. With Team Arrow and Nyssa on opposing sides concerning how to handle the quickly unraveling assassin, Laurel must decide who to trust with her sister's wellbeing. Oliver takes a big step to becoming who he wants to be.
- Stephen Amell as Oliver Queen
- Katie Cassidy as Laurel Lance/Black Canary
- David Ramsey as John Diggle/The Guardian
- Willa Holland as Thea Queen (credit only)
- Katrina Law as Nyssa al Ghul
- Caity Lotz as Sara Lance/White Canary
- Colin Donnell as Tommy Merlyn
- and John Barrowman as Malcolm Merlyn/Ra's al Ghul
- Wentworth Miller as Leonard Snart/Captain Cold
- Casper Crump as Vandal Savage
- and Maria Valverde as Carlotta Rivera
- Antagonists: Sara Lance, Tommy Merlyn
- Thea does not appear in this episode.
- First episode to feature Sara as an antagonist.