Where can I watch “Lab Rats” Season 4 Episode 3 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

Do I need to watch earlier episodes before “Left Behind”?

Watching earlier episodes in season 4 helps you follow the plot and character arcs leading into this episode.

Watch Lab Rats Season 4 Episode 3 Online

“Left Behind” — Watch "Lab Rats" Season 4 Episode 3 online in HD for free. Check streaming providers, cast, and episode details.

Mar 25, 2015 Season 4 Episode 3 22 min TV-Y7

3.0 ★ ★ ★ ★ ★

1 votes

Lab Rats Season 4

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Season 4 Episode 3 — Aired on Mar 25, 2015 • runs about 22 minutes.

Directed by Hal Sparks.

Written by Julia Miranda.

Notable cast/guest names in this episode include William Brent, Spencer Boldman, Kelli Berglund, Tyrel Jackson Williams.

This page includes 1 official still(s) (when available) plus legal availability links.

Looking for “watch Lab Rats Season 4 Episode 3 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

After sneaking some students off the island and to the mainland, the Lab Rats accidentally leave Spin and Bob behind and must retrieve them before Donald finds out. Meanwhile, Donald tries on Chase's mission suit and he and Leo scramble to get it off before Chase gets home.