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The Spaghetti Catalyst

The Spaghetti Catalyst

One of the consequences of Penny and Leonard breaking up is that Sheldon now has mixed allegiances. Leonard is his best friend and roommate, but he wants to remain friends with Penny if only because of all the work he's put into including her into his life. Sheldon goes to extreme lengths not to tell Leonard - or Howard or Raj for that matter - that he is having dinner with Penny. Will it be worth all the grief that he has to go through to keep this secret? Meanwhile, Leonard and Penny have to learn how to deal with the fact that they will still be seeing each other, and decide what form their new relationship will take. Written by Huggo

  • Duration: 20 min
  • IMDb: 8.2

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All Episodes - S03

Parent Show

HD The Electric Can Opener Fluctuation

The Electric Can Opener Fluctuation

EPS01

The Electric Can Opener Fluctuation - EPS 01

HD
IMDb: 8.4
2009
21 min

Immediately upon the guys' arrival back from the three month long Arctic expedition, Leonard, Howard and Raj make a confession to Sheldon about their participation in She ...

Country: USA
Genre: Comedy, Romance,
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HD The Jiminy Conjecture

The Jiminy Conjecture

EPS02

The Jiminy Conjecture - EPS 02

HD
IMDb: 7.9
2009
21 min

After hearing a cricket chirping, Howard and Sheldon make a wager, the winner to get one of the other's favorite comic books. Their wager is on whether the cricket is a c ...

Country: USA
Genre: Comedy, Romance,
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HD The Gothowitz Deviation

The Gothowitz Deviation

EPS03

The Gothowitz Deviation - EPS 03

HD
IMDb: 8.2
2009
20 min

Now that Leonard and Penny are dating, which means that Penny will be at the guys' apartment more often, Sheldon and Penny have to come to an understanding on how to get ...

Country: USA
Genre: Comedy, Romance,
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HD The Pirate Solution

The Pirate Solution

EPS04

The Pirate Solution - EPS 04

HD
IMDb: 8.1
2009
20 min

It's Columbus Day and Thanksgiving is approaching, but Raj in particular is not in a thankful mood. His research stalled six months ago with no hope of success. With no j ...

Country: USA
Genre: Comedy, Romance,
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HD The Creepy Candy Coating Corollary

The Creepy Candy Coating Corollary

EPS05

The Creepy Candy Coating Corollary - EPS 05

HD
IMDb: 8.3
2009
20 min

Howard reminds Leonard of a five year old pact between the two. Effectively, the pact stipulates that Penny has to set Howard up with one of her friends. Leonard has to t ...

Country: USA
Genre: Comedy, Romance,
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HD The Cornhusker Vortex

The Cornhusker Vortex

EPS06

The Cornhusker Vortex - EPS 06

HD
IMDb: 7.6
2009
20 min

To chase after a woman with whom he had no chance - again - Howard leaves Raj at a critical moment during a kite flying challenge against Sheldon and Leonard. This is the ...

Country: USA
Genre: Comedy, Romance,
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HD The Guitarist Amplification

The Guitarist Amplification

EPS07

The Guitarist Amplification - EPS 07

HD
IMDb: 7.9
2009
20 min

An argument between Leonard and Penny proves inconvenient to Sheldon. Written by CBS Publicity ...

Country: USA
Genre: Comedy, Romance,
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HD The Adhesive Duck Deficiency

The Adhesive Duck Deficiency

EPS08

The Adhesive Duck Deficiency - EPS 08

HD
IMDb: 9.0
2009
21 min

While Leonard, Howard and Raj are off camping to observe the Leonid meteor shower, Sheldon is at home doing work. It's lucky for Penny that Sheldon did stay behind as she ...

Country: USA
Genre: Comedy, Romance,
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HD The Vengeance Formulation

The Vengeance Formulation

EPS09

The Vengeance Formulation - EPS 09

HD
IMDb: 8.4
2009
19 min

After their third date, Bernadette wants an understanding with Howard about where their relationship is heading before proceeding to the next step of sex. Howard is unsur ...

Country: USA
Genre: Comedy, Romance,
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HD The Gorilla Experiment

The Gorilla Experiment

EPS10

The Gorilla Experiment - EPS 10

HD
IMDb: 8.6
2009
21 min

When Bernadette joins the guys and Penny for their usual Chinese take-out dinner, Bernadette, the microbiologist, becomes fascinated with Leonard's physics project. Both ...

Country: USA
Genre: Comedy, Romance,
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HD The Maternal Congruence

The Maternal Congruence

EPS11

The Maternal Congruence - EPS 11

HD
IMDb: 8.4
2009
20 min

It's approaching Christmas, and Leonard's mother is coming for a visit, something Leonard fails to tell Penny. Sheldon surmises it's because Beverly Hofstadter will not a ...

Country: USA
Genre: Comedy, Romance,
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HD The Psychic Vortex

The Psychic Vortex

EPS12

The Psychic Vortex - EPS 12

HD
IMDb: 8.4
2010
20 min

With Leonard and Howard going on a double date, Raj talks a reluctant Sheldon into attending a mixer at the university. Surprisingly, Raj and Sheldon end up meeting and h ...

Country: USA
Genre: Comedy, Romance,
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HD The Bozeman Reaction

The Bozeman Reaction

EPS13

The Bozeman Reaction - EPS 13

HD
IMDb: 8.1
2010
20 min

Sheldon and Leonard's apartment is robbed. Leonard takes the incident in stride, but Sheldon has an extreme reaction to his space being violated and his possessions stole ...

Country: USA
Genre: Comedy, Romance,
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HD The Einstein Approximation

The Einstein Approximation

EPS14

The Einstein Approximation - EPS 14

HD
IMDb: 8.5
2010
20 min

Sheldon can't sleep since he is totally preoccupied with solving a physics graphine problem. By association, Leonard and Penny can't sleep since Sheldon is continually bo ...

Country: USA
Genre: Comedy, Romance,
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HD The Large Hadron Collision

The Large Hadron Collision

EPS15

The Large Hadron Collision - EPS 15

HD
IMDb: 8.1
2010
21 min

Valentine's Day is approaching. Leonard thinks he's hit some good luck in that he has been asked to attend a conference and view the Hadron super collider in Switzerland ...

Country: USA
Genre: Comedy, Romance,
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HD The Excelsior Acquisition

The Excelsior Acquisition

EPS16

The Excelsior Acquisition - EPS 16

HD
IMDb: 8.4
2010
21 min

With only a learner's permit in his possession and not even owning a car, Sheldon is summoned to traffic court after he is caught speeding by a traffic camera. He was dri ...

Country: USA
Genre: Comedy, Romance,
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HD The Precious Fragmentation

The Precious Fragmentation

EPS17

The Precious Fragmentation - EPS 17

HD
IMDb: 8.5
2010
20 min

Leonard, Sheldon, Howard and Raj jointly purchase a box, whose contents are unknown, for $60 at a garage sale. While sorting through it, they find that it contains primar ...

Country: USA
Genre: Comedy, Romance,
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HD The Pants Alternative

The Pants Alternative

EPS18

The Pants Alternative - EPS 18

HD
IMDb: 8.5
2010
21 min

Sheldon is this year's recipient of the college's Chancellor's Award for Science. He is surprised at being named the winner, but he believes he has been the deserving rec ...

Country: USA
Genre: Comedy, Romance,
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HD The Wheaton Recurrence

The Wheaton Recurrence

EPS19

The Wheaton Recurrence - EPS 19

HD
IMDb: 8.0
2010
21 min

The guys and Penny have a friendly but wagered bowling match against Stuart and his team. The match gets a little heated when one of Stuart's regulars can't make it, the ...

Country: USA
Genre: Comedy, Romance,
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HD The Spaghetti Catalyst

The Spaghetti Catalyst

EPS20

The Spaghetti Catalyst - EPS 20

HD
IMDb: 8.2
2010
20 min

One of the consequences of Penny and Leonard breaking up is that Sheldon now has mixed allegiances. Leonard is his best friend and roommate, but he wants to remain friend ...

Country: USA
Genre: Comedy, Romance,
Watch Episode
HD The Plimpton Stimulation

The Plimpton Stimulation

EPS21

The Plimpton Stimulation - EPS 21

HD
IMDb: 8.2
2010
21 min

Sheldon's brilliant pen pal friend, renowned quantum cosmologist Dr. Elizabeth Plimpton, is being wooed by Cal Tech. Sheldon invites her to stay with him and Leonard whil ...

Country: USA
Genre: Comedy, Romance,
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HD The Staircase Implementation

The Staircase Implementation

EPS22

The Staircase Implementation - EPS 22

HD
IMDb: 9.1
2010
20 min

After Leonard and Sheldon have a heated argument about what Sheldon sees as Leonard making a major breach in the roommate agreement, Leonard takes refuge at Penny's apart ...

Country: USA
Genre: Comedy, Romance,
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HD The Lunar Excitation

The Lunar Excitation

EPS23

The Lunar Excitation - EPS 23

HD
IMDb: 8.7
2010
20 min

Penny and Leonard are still at the stage of their post-coitus relationship where they feel awkward doing friend type things together. Regardless, when the guys experiment ...

Country: USA
Genre: Comedy, Romance,
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