The episode title "Green Book" refers to "The Green Book", a short book, published in 1975, setting out the political philosophy of Libyan leader Muammar Gaddafi. It is said to have been inspired in part by The Little Red Book, the quotations from chairman Mao Tse-tung.
In the first episode of season 1 (Operation Quantum Jump) while being recruited by his aunt and Schweppenstette, Martin Rauch states that he does not play the piano; yet when Brigitte Winkelmann enters her apartment in Paris, Martin Rauch plays the piano with virtuosity.