Where can I watch “The Big Bang Theory” Season 12 Episode 21 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).

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Watching earlier episodes in season 12 helps you follow the plot and character arcs leading into this episode.

Watch The Big Bang Theory Season 12 Episode 21 Online

“The Plagiarism Schism” — Watch "The Big Bang Theory" Season 12 Episode 21 online in HD for free. Check streaming providers, cast, and episode details.

May 2, 2019 Season 12 Episode 21 20 min PG

6.9 ★ ★ ★ ★ ★

35 votes

The Big Bang Theory Season 12

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Season 12 Episode 21 — Aired on May 2, 2019 • runs about 20 minutes.

Directed by Nikki Lorre.

Written by Steve Holland, Tara Hernandez.

Notable cast/guest names in this episode include Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg.

This page includes 3 official still(s) (when available) plus legal availability links.

Looking for “watch The Big Bang Theory Season 12 Episode 21 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Kripke has proof that Dr. Pemberton plagiarized his thesis in college, and Sheldon and Amy aren't sure if they should turn him in or not. Meanwhile, Howard learns that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him.