- The gang become concerned when Sheldon's former admirer, Ramona Nowitzki, resurfaces while Amy is away at Princeton.
- Amy has now started her summer research stint at Princeton. Much to Leonard's chagrin, he has reassumed many of the responsibilities for Sheldon that Amy had taken over when she and Sheldon started seriously dating, such as driving him to specific places. But one of the responsibilities that Leonard can and will not take over may be instead assumed by Dr. Ramona Nowitzki, who Sheldon first met years ago when she was an admiring grad student and who has now reentered his life as she does research at Cal Tech. Sheldon then could not see that Ramona had a romantic interest in him, but now having been in an intimate relationship with Amy, Sheldon may now be more susceptible to romantic female advances. Sheldon and Amy's friends do not know if Ramona is once again after Sheldon, and thus if they should be worried for Amy's sake and do something to intervene or at least inform Amy of Ramona. Things take on new dimensions when Amy does find out about Ramona, and at least one person within this group does learn if Ramona still has a romantic interest in Sheldon.—Huggo
- Sheldon is Skyping with Amy from her apartment in New Jersey. She clearly misses him especially when she ended a sentence with a proposition and Sheldon wasn't there to correct her. They then start teasing each other on how he would punish her for such an infraction.
At the Caltech cafeteria, Leonard is complaining about all the errands he has to take Sheldon on now with Amy away. Raj offers to take him to Home Depot so Sheldon can look at ladders. Sheldon shows up with Dr. Ramona Nowitzki (Riki Lindhome) who was the graduate student that was so taken with Sheldon in season 2. She is back at Caltech working on her post doctorate degree at the CERN Hadron Collider as part of an American team. She brought Sheldon a Toblerone chocolate bar from Switzerland which Leonard claims to love. Sheldon and Ramona go to sit elsewhere. The guys wonder what is happening while Sheldon and Ramona are talking about their work and laughing together. She is even touching his arm without Sheldon complaining or applying Purell.
Bernadette and Penny are discussing the Sheldon situation. Howard mentioned Ramona touching him while Leonard could only remember the Toblerone bar. They decide not to worry Amy, while Penny wonders if living with Amy has somehow stirred up Sheldon's sexual appetite. Bernadette is revolted by Penny even putting those words together.
Over in Apartment 4B, Sheldon is talking to Amy about his trip to Home Depot and then mentions having lunch with Dr. Nowitzi. Sheldon feels that Amy would like her since she is a brilliant scientist, like her, except that she is tall, blonde and used to be an Olympic swimmer. Amy excuses herself and calls Penny. She yells at her, "I gave you one job! Keep an eye on him. How hard is that?" The girls thought she'd meant to not let him run out into traffic which he only did once. They tell her that they didn't want her to worry. SHOULD she be WORRIED? Penny thinks not since it's Sheldon. Amy is worried that she has been smacking that ketchup bottle for a long time. All she's got to do is tip it over and point it at her fries.
At the comic book store, the guys are complaining that Sheldon did something and their wives are yelling at them. Should they do something about Nowitzki? Raj and Stuart both argue about who should ask her out to test her interest in Sheldon.
In the cafeteria, Raj approaches her and even though she is polite, she tells him that he can't sit down at her table. Howard feels that they should call Guinness for the world's fastest turn down. Later Ramona invites Sheldon to join her at her table. It is clear that Ramona is interested in Sheldon.
Later at apartment 4A, the guys figure that that is not a test since there are hundreds of reasons to turn down Raj. Sheldon then shows up with Ramona who has just gone swimming with her. They are excited since Sheldon never goes swimming. Penny asks if she had talked to Amy today. He has and Ramona can't wait to meet her; she keeps asking how long she'll be away. Ramona doesn't have anyone special, but had been working with Peter Higgs at CERN in Switzerland. Sheldon had some correspondence from him and they both went over to 4B to look at them.
Looking over the letters, Sheldon shows her one from Patrick Stewart which says that if he comes over to his house again, he gets to meet his dogs. Amy calls up looking happy until she realizes that Dr. Nowitzi is in their apartment with Sheldon. Ramona says that she is happy to meet her. Leonard then calls Amy to warn her, and Amy yells at him that he is a bit late. Sheldon is angry at Leonard for calling at this later hour, Ramona also agrees.
While the gang struggles with what to do, Sheldon returns to say good night because Amy says that he is tired and should go to bed. Ramona asks him to walk her to her car. Penny volunteers everyone to go with them and they place themselves between the two all the way to the street. Penny tells Sheldon that they have to have a little talk.
Back in Penny's old apartment, she explains that Sheldon doesn't have a lot of experience with women and that Ramona seems to have a romantic interest in him. Sheldon objects that she is just a colleague and that she knows that he has a girlfriend. Yes, but some women don't care. Penny wants him to think of himself as a limited-edition collector's toy. Sheldon realizes that because there are few of him that makes him more valuable. Then Sheldon adds that Amy has already taken him out of my package and played with him. Penny changes her approach and doesn't want to discuss Sheldon's sex life. Finally Sheldon still feels that Ramona is just a friendly colleague while Leonard and Penny need to see a marriage counselor about Leonard calling Amy up.
Finally, Ramona brings lunch to Sheldon who tells her that that is very thoughtful. She says that it's nothing since she likes to spend time with him. Sheldon then asks her directly if she has a romantic interest in him, and she asks what if she has? Sheldon starts to list the problems with this, namely that they are colleagues and he has a girlfriend when Ramona quickly kisses him looking for a reaction. A shocked Sheldon immediately excuses himself, gets into a taxi, goes to the airport, flies to New Jersey ending up at Amy's apartment door. Amy is on her computer when Sheldon knocks in his distinctive way. Surprised, she goes to the door to find Sheldon on his knee with his grandmother's engagement ring asking her to marry him. Fade out.
Title reference: Sheldon and Amy's long-distance relationship problems.
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![Jim Parsons and Riki Lindhome in The Big Bang Theory (2007)](https://m.media-amazon.com/images/M/MV5BMjAyYjc1OWMtNmM3Yi00NzljLTk2YjktNmVlZDM1ZGE2YTA2XkEyXkFqcGdeQXVyNjc5Mjg0NjU@._V1_QL75_UY133_CR55,0,90,133_.jpg)