Where can I watch “The Big Bang Theory” Season 12 Episode 12 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 12 Online

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

Jan 10, 2019 Season 12 Episode 12 20 min PG

6.7 ★ ★ ★ ★ ★

39 votes

The Big Bang Theory Season 12

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Where can I watch "The Propagation Proposition" online?

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Season 12 Episode 12 — Aired on Jan 10, 2019 • runs about 20 minutes.

Directed by Mark Cendrowski.

Written by David Goetsch, Eric Kaplan.

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

This page includes 4 official still(s) (when available) plus legal availability links.

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

Synopsis

Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard, which makes Penny to freak out. Also, Raj attempts to mend things with his ex-fiancée, Anu.