A sequel to "The Biophysical Relationship Evolution", "The Biophysical Relationship Continuation" and "The Biophysical Relationship Development". The story continues three and a half years after the birth of Marie Hofstadter. Everything belongs to Chuck Lorre and friends.

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Just before the Xmas holidays Professor Bernadette Rostenkowski-Cooper's research group had a farewell party for Ellen Rashid, a Cambridge Ph.D student in microbiology who had just finished a year studying at Caltech. Microbiology experimental officer Dr. Jane Parker was also at the party as was Bernadette's husband Sheldon. Just before the party started to break up they were joined by Professor Tom Kariuki, Assistant Dean of Biological Sciences at Caltech.

Bernadette: "Hello Tom, what a pleasant surprise, come and have some cake."

Kariuki: "Thank you Bernadette, I think that I will. I have come to say goodbye to Miss Rashid."

Bernadette: "Sure thing. Ellen, you have a visitor."

Ellen: "Good afternoon, I am Ellen Rashid."

Kariuki. "Good afternoon to you Miss Rashid. My name is Professor Tom Kariuki, I am not sure if you remember, we met very briefly just after you arrived here in January."

Ellen: "Yes I remember you Professor."

Kariuki: "Professor Rostenkowski-Cooper has been telling me good things about your work here at Caltech over the last year. I am sure the whole research group will be sad do see you go."

Ellen: "That is nice to hear. I have had a good time here at Caltech, back home to good old Cambridge tomorrow."

Kariuki: "Good old Cambridge indeed, I wish I could come with you. I was once young like you and studying for a Ph.D at Cambridge. Happy days."

Ellen: "Which college?"

Kariuki: "Wolfson."

Ellen: "I am at Churchill."

Kariuki: "I understand that you should be submitting your thesis in the summer."

Ellen: "I hope so."

Kariuki: "Good luck with your writing up and safe journey home. Please excuse me, I need to have a word with Professor Rostenkowski-Cooper."

Ellen: "Thank you Professor."

Kariuki: "Bernadette, may I have a word with you in private. You too Professor Cooper, it concerns you both..."