|Vengeance is Justice|
|Season 6, Episode 12 (86)|
|By Whatever Means Necessary||Always Trying to Save the World|
PART 1 OF 3: SWEETNESS- An old reject from the League of Assassins targets Talia, forcing Nyssa to put aside her differences with her sister to keep her alive. Helena tries to convert the team to her way of thinking. Brainiac deciphers the origin of a new player.
- Katie Cassidy Rodgers as Laurel Lance/Black Canary
- Katrina Law as Nyssa al Ghul
- Jessica de Gouw as Helena Bertinelli/Huntress
- Caity Lotz as Sara Lance
- Willa Holland as Thea Queen
- Katie McGrath as Lena Luthor
- Amy Acker as Brainiac
- Odette Annable as Samantha Arias
- Jane Levy as Barbara Gordon/Oracle
- Leven Rambin as Lyvia Luthor
- Dove Cameron as N.E.M.E.S.I.S.
- Matt Ryan as John Constantine
- Mehcad Brooks as James Olsen/Guardian
- and Justin Hartley as Oliver Queen (Earth 19)
- Lexa Doig as Talia al Ghul
- Rebecca Breeds as Adeline Kane
- Crystal Reed as Mary Turner
- Georgina Haig as Mercy Graves (Earth-16)
- and Alan Tudyk as Jonathan Graves
- Antagonists: Jonathan Graves
- This episode is Nyssa-centric.
- This episode takes place on January 23, 2025.