Réponse :
Slt!!
a) Julie started watching Breaking Bad because her boyfriend was confined to bed, and he loved the show and there was nothing they can do together.
b) "some days we'd watch 5 episodes"
"it became part of his recovery"
"her boyfriend was hooked"
c) They strengthen relationship due to the fact that they are connecting on a same subject, they are both watching something they love, they have a new subject to talk about after finishing the series.
d) (c'est mon avis mais tout le monde peut avoir un avis different :) )
In my opinion, I think that its a fun and nice way to connect over series because it opens new discussion and subjects to talk about. On the other hand, I disagree with the fact that the relationship is based on the series, because then there would be nothing else to do.