| Classic: Knock knock knock &# 34; Penny?&# 34; |
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Classic: Knock knock knock "Penny?"
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| Knock Knock Knock Knock &# 34; Leonard?&# 34; Done by... |
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Knock Knock Knock Knock "Leonard?" Done 의해 Sheldon, 1.10
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| Knock Knock Knock (SHELDON?) Done 의해 Penny,... |
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Knock Knock Knock (SHELDON?) Done 의해 Penny, angrily, 2.07
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| Knock War: Sheldon and Penny, 2. 23 |
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Knock War: Sheldon and Penny, 2.23
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| Knock Knock Knock (Pe- nny?) Computer, 2. 10 |
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Knock Knock Knock (Pe-nny?) Computer, 2.10
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| Sheldon knocks twice, Penny opens the door, and he... |
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Sheldon knocks twice, Penny opens the door, and he still knocks a third time.
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| &# 34; Leonard? Leonard? Leonard?&# 34; &# 34; What Sheldon what... |
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"Leonard? Leonard? Leonard?" "What Sheldon what Sheldon WHAT Sheldon?"
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| Knock Knock Knock “ Leonard And Penny?” Sheldon... |
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Knock Knock Knock “Leonard And Penny?” Sheldon 3.13
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| Knock Knock Knock &# 34; Raj?&# 34; Sheldon, 3. 04 |
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Knock Knock Knock "Raj?" Sheldon, 3.04
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| Sheldon knocks on 4B&# 39; s open door, 3. 05 |
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Sheldon knocks on 4B's open door, 3.05
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| Sheldon knocks twice, Penny knocks for herself the... |
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Sheldon knocks twice, Penny knocks for herself the third time. 3.16
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| Sheldon knocks, getting quieter for each &# 34; Penny?&# 34;,... |
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Sheldon knocks, getting quieter for each "Penny?", The Wheaton Recurrence
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