Arcane 1x4 Happy Progress Day! Season 1 Season 1 9 Episodes 1x1 - Welcome to the Playground 1x2 - Some Mysteries Are Better Left Unsolved 1x3 - The Base Violence Necessary for Change 1x4 - Happy Progress Day! 1x5 - Everybody Wants to Be My Enemy 1x6 - When These Walls Come Tumbling Down 1x7 - Episode 7 1x8 - Episode 8 1x9 - Episode 9 With Piltover prospering from their tech, Jayce and Viktor weigh their next move. A familiar face re-emerges from Zaun to wreak havoc.