Amy meets Raj's sister Priya and they discuss his selective mutism. Everything belongs to Lorre and Prady.

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"One of my male colleagues is an expert on selective mutism and I have been talking to him about you. He thinks that he might be able to help but he needs Priya with you at the same time."

Next day Raj and Priya met Amy at Caltech, Amy took them to meet her colleague.

"Raj and Priya, this is my colleague Professor Patrick O'Riley. Professor O'Riley, this is Dr. Raj Koothrappali from Physics and his sister Priya who is visiting from India until tomorrow."

"Thank you for coming, Dr. Fowler has told me about Dr. Koothrappali's selective mutism. I understand that until he met Dr. Fowler the only females he could talk to were you, your sister and your mother."

"That's right, just the three of us, Amy has joined a very exclusive club."

"The plan is I want to make a video recording you Dr. Koothrappali talking to you Ms. Koothrappali. His face will be visible on camera but yours will not be visible Ms. Koothrappali. Just chat away like brother and sister, have a nice relaxed chat about whatever you want. However, don't include any really personal family things. The plan is to then get some other ladies to repeat what she says and we dub their voices over your sisters voice. We will then repeatedly show Dr. Koothrappali this video alternating between the voices of Ms. Koothrappali and other ladies. Having seen himself having had a friendly chat with these other ladies then perhaps he could then talk to this lady for real. This has sometimes worked with other cases of selective mutism."

Raj then said "when do we start?"

For the next 30 minutes Raj and Priya chatted away about her impressions of California on her first visit, memories of their time in Cambridge, how things are back home in Delhi and the prospects of the Indian cricket team for their next Test series.

When it was all over Professor O'Riley said "Excellent, thank you for your time Ms. Koothrappali, I hope that you have a safe journey home to India. Over the next week will get some ladies to record your words as you chatted to your brother. Then Dr. Koothrappali will be invited back to see if he can speak to these ladies."

The next day was a Saturday, Amy went to the airport to say goodbye to Priya. Before she boarded she gave Amy a hug and said "thanks for all you have done, look after my brother."

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Next week it was time for Raj to view the dubbed video recordings of his conversation with his sister. First up was Amy's colleague Dr. Sara Hubbard, who Raj had met briefly met. However, all he could do was smile when she came into the room. Three other ladies tried but couldn't get a word out of Raj, they had even tried an Indian graduate student who looked a bit like Priya but that didn't work.

Later that evening Raj and Amy discussed the failure at the Cheesecake Factory.

Raj said "They are going to try some more ladies next week, the problem is that the ladies didn't sound anything like Priya, not even the Indian lady. They were pretty lousy actors."

Amy replied "That gives me an idea! Excuse me Penny, can you come over here please."

Penny came over "Hello, is there anything wrong with the food?"

"No, everything is fine. I never properly introduced myself, I am Amy, Raj's friend. Raj tells me that you are an actress. Would you like to use your acting skills to help Raj?"