La Brea - Season 3 -

Riley’s vision guides them to an underground cavern beneath the original sinkhole — the resting place of the first Ancestor, a being who sacrificed herself to stabilize time. The “temporal anchor” is her preserved heart, pulsing with energy.

Gavin, Ty, and Riley stage a rescue. In the fight, Riley is fatally wounded — but before she dies, she touches the bunker’s core and sees the entire history of the rifts. Her final words: “It’s not a machine. It’s a grave .”

We open moments after Season 2’s finale. Eve (Natalie Zea) watches in horror as the portal to 2021 closes, leaving her son Josh (Jack Martin) stranded on the other side. Meanwhile, Gavin (Eoin Macken) clutches his head — a new, violent vision floods his mind: not of the past, but of a future Los Angeles consumed by a second, deadlier sinkhole event.

Battle erupts at the cavern. Lucas sacrifices himself to destroy Maya’s command center, trapping her in a collapsing side rift (her fate left ambiguous). Ty and Veronica lead the survivors in a desperate last stand. La Brea - Season 3

Zane reaches the heart first and tries to absorb its power, but the Ancestor’s spirit rejects him — he’s been corrupted by grief and control. The heart begins to shatter, causing time storms: mammoths appear in the bunker, modern guns turn to stone, and the sky tears open.

Gavin refuses. But Eve whispers: “I already died in one timeline to save you. Let me save everyone now.”

But Gavin pauses at the edge of the rift, looking back. He sees a vision of Eve, smiling, standing beside the heart. He whispers, “I’ll find you again. In every time.” Riley’s vision guides them to an underground cavern

They’re attacked by a new tribe: , humans who worship the rift technology and believe closing it will unmake existence. Their leader, Zane (played by Alex Meraz), captures Sam and Veronica. Zane reveals he is also “rift-touched” — a descendant of the Ancestors — and that Eve’s return was a trap. “The rifts chose your family, Gavin,” Zane sneers via a psychic link. “But you’ve been closing doors that should stay open.”

Meanwhile, Josh reopens the rift in 2021, but Maya Singh double-crosses him, sending armed troops through first. A firefight erupts in 10,000 BC between Maya’s soldiers, Zane’s Keepers, and the survivors.

Gavin, Josh, Sam, Ty, Veronica, and the remaining survivors use the repaired anchor to open a final rift — not to 2021, but to a new timeline where the sinkhole never happened. They step through, arriving in a sunny, peaceful Los Angeles. No disaster. No scars. They reunite with their loved ones who never knew they were gone. In the fight, Riley is fatally wounded —

In 10,000 BC, the survivors — led by Sam (Jon Seda), Ty (Chiké Okonkwo), Veronica (Lily Santiago), Riley (Veronica St. Clair), and a guilt-ridden Lucas (Josh McKenzie) — realize the aurora borealis that brought Eve back has vanished. They’re trapped. But a seismic tremor opens a chasm near the village, revealing a buried military bunker from the 1950s.

“Home” by Edward Sharpe & The Magnetic Zeros. Tagline: Time brought them together. Love brought them home.

Back in 2021, Josh finds himself alone in a quarantined L.A. The sinkhole site is now a high-security government lab run by a ruthless new director, (new series regular, played by Nimrat Kaur). She believes Josh’s DNA — part of Gavin’s “rift-touched” bloodline — is the key to controlling the ancient anomalies.