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20/20 S49E2 — What Happened to the McStays?

6.9

20/20•Season 49•Episode 2

What Happened to the McStays?

6.9/10 · 33 votesOct 3, 202581 min

Ranked #16 of 32 in Season 49•+0.1 vs season avg

In 2010, Joseph and Summer McStay and their two young sons vanished from their Fallbrook, California, home. For nearly four years, the family’s fate remained unknown—until a grim discovery in the Mojave Desert turned the missing persons case into a homicide investigation.

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Seasons29

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Season 49 Episodes33

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E2 6.9Now viewing

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Cast2

David Muir

David Muir

Self - Anchor

Deborah Roberts

Deborah Roberts

Self - Anchor

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Episode Summary

"What Happened to the McStays?" is episode 2 of 20/20 season 49. It scored 6.9/10 from 33 votes, ranking #16 of 32 episodes this season (season average 6.8). It aired on October 3, 2025.

Next: E3 · Life on the Line Best of Season 49