The injector that Jim uses to self-inject the 'booster shot' is a direct homage to the injector against Douglas Quaid in the original Total Recall movie.
According to the director's commentary, the city references Coruscant of the Star Wars Universe in that the rich live and work in the upper levels of the sky scrapers whereas the 'commoners' [such as Abby and Jim] live lower-level apartments and work at the ground level.
When Abby makes a crack about Chuck's bedside manner, Chuck says, "I'm a physicist, not an M.D." His response is a play on Dr. McCoy's usual response of "I'm a doctor, not a _______!"
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By what name was Synchronicity (2015) officially released in India in English?