Sarah and Paul were perhaps the most predictable couple of season one, but we can't complain about his frequent shirtless scenes. Alison and her high school sweetheart Donnie have the most devastating arc, but we'll come back to that later. The romantic core of the show belongs to the couple we all hope makes it to the end: Cosima and Delphine. Cosima, the most optimistic and eccentric of the clones, falls hard for fellow student Delphine, only to find out that she's involved with Aldous Leekie in more ways than one. Delphine seems to have a change of heart in the closing episodes of the season and notably doesn't disclose Kira's existence to her boss, but by then Cosima has developed a respiratory illness which may be fatal. If Cosima dies in Delphine's arms later in the season, we'll be heartbroken.