12 Reasons To Watch Big Bang Theory Episode 6

1. "The Expedition Approximation"

Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel. Meanwhile, Leonard and Penny seek advice from Wolowitz and Bernadette after they fight about money, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Melissa Rauch, Simon Helberg, Kunal Nayyar, Mayim Bialik, Jim Parsons, Johnny Galecki and Kaley Cuoco-Sweeting Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Sheldon and Raj

2. Sheldon and Raj

Sheldon (Jim Parsons, left) and Raj (Kunal Nayyar, right) test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Raj, Sheldon and Amy

3. Raj, Sheldon and Amy

Sheldon (Jim Parsons, right) and Raj (Kunal Nayyar, left) test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: Mayim Bialik (far right) Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Sheldon

4. Sheldon

Sheldon (Jim Parsons, left) and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Amy helps Sheldon get prepared

5. Amy helps Sheldon get prepared

Sheldon (Jim Parsons, left) and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: Mayim Bialik (right) Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Penny and Leonard

6. Penny and Leonard

Leonard (Johnny Galecki, right) and Penny (Kaley Cuoco-Sweeting, left) seek advice from Wolowitz and Bernadette after they fight about money, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Can they survive a dark-matter research expedition?

7. Can they survive a dark-matter research expedition?

Sheldon (Jim Parsons, right) and Raj (Kunal Nayyar, left) test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Leonard and Penny have an argument

8. Leonard and Penny have an argument

Leonard (Johnny Galecki, right) and Penny (Kaley Cuoco-Sweeting, left) seek advice from Wolowitz and Bernadette after they fight about money, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Getting prepared for their simulation

9. Getting prepared for their simulation

Sheldon (Jim Parsons, right) and Raj (Kunal Nayyar, left) test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: Mayim Bialik (center) Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Amy and Sheldon

10. Amy and Sheldon

Sheldon (Jim Parsons, right) and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured: Mayim Bialik (left) Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Howard and Bernadette have an argument

11. Howard and Bernadette have an argument

Leonard and Penny seek advice from Wolowitz (Simon Helberg, right) and Bernadette (Melissa Rauch, left) after they fight about money, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved
Seeking advice from Howard and Bernadette

12. Seeking advice from Howard and Bernadette

Leonard and Penny seek advice from Wolowitz and Bernadette after they fight about money, on THE BIG BANG THEORY, Monday, Oct. 20 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Johnny Galecki, Kaley Cuoco-Sweeting, Simon Helberg and Melissa Rauch Photo: Monty Brinton/CBS ©2014 CBS Broadcasting, Inc. All Rights Reserved