CinemaBlend Harley Quinn.) That said, fans thought they'd found just such a specific Big Bang easter egg in The Flight Attendant's recently aired Season 1 finale, but it turns out the moment was just a big coincidence. In the midst of the episode "Arrivals and Departures," Kaley Cuoco's Cassie Bowden was in Rome and made a frantic return to her hotel room accompanied by her occasional friend-with-benefits Enrico (Alberto Frezza). Just before Enrico went to go back downstairs to nab Cassie a coffee from the hotel bar, she gave him instructions on what to do when he returned so that she would know it was him. And that's where the theoretical