The Line Substitution Solution
🎞️ S9 E23 ✅ All clear

The Big Bang Theory

Is The Big Bang Theory S9 E23 OK for kids?

The Line Substitution Solution

Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly, comes to town and Penny struggles to make a connection with her.

📺 Where to watch

Netflix, HBO or Disney+ — catalogs differ by country.

🛒 Where to buy

Digital seasons or a box set to keep.

Content guide

👊 Violence
💋 Sex
🙊 Language
⭐ Overall

Mild — okay from about 10+

The Big Bang Theory S9 E23, “The Line Substitution Solution”, scores 1/5 for violence, 2/5 for sex and 1/5 for language, for an overall kid-rating of 2/5 — Mild — okay from about 10+. Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly, comes to town and Penny struggles to make a connection with her.

Across the episode we counted 3 flagged moments in 3 themes: Sex & hookups (1); Affairs / cheating (1); Violence & injury (1). Every moment below is either a direct quote from the episode transcript or a short description of what happens on screen, so you can decide before you press play.

Watch for — every moment, theme by theme

Sex & hookups 1 moment

How Sex & hookups shows up in The Big Bang Theory S9 E23:

  • Penny Well, I’d actually like for us to be close, but maybe we start with our favourite books and work our way up to my husband’s sex organs.

Affairs / cheating 1 moment

How Affairs / cheating shows up in The Big Bang Theory S9 E23:

  • Sheldon Well, what a sad state of affairs. That you’ve all been so ground down by life, you don’t even notice when someone disrespects you.

Violence & injury 1 moment

How Violence & injury shows up in The Big Bang Theory S9 E23:

  • Howard I can’t believe we’re gonna get beat up, and it’s not because of your chair.

Watch With The Kids · You kids — your rules! · Informal parent guidance, not an official rating.