Complete story — includes the ending
The team learns that Lian Yu has been giving off an immense amount of strange energy and Lyla tasks William with creating a device to harness it, while the plutonium to power it is being brought to the island by Dinah, Rene and Roy. Their plane is shot down by a missile and crash-lands on Lian Yu. Diggle, Lyla, and Connor rescue Dinah and Rene, while Oliver and Laurel retrieve the plutonium. However, they are confronted by Edward Fyers, Billy Wintergreen and Yao Fei – deceased figures from Oliver's past who were all revived by the island's supernatural energy. Meanwhile, Diggle's party finds Roy, whose right arm is pinned, forcing Connor to amputate it. After William completes the weapon, Lyla activates it and transforms, absorbing the island's energy and causing its revived inhabitants to disappear before entering a portal. She later returns, now calling herself a "harbinger of things to come", and informs Oliver and Mia that the Crisis has begun as the sky turns red.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Arrow season 8. HTML formatting and reference markers removed. · Content license