What with all the drama on the show and the plots and all and how ridiculous they get, I sometimes wonder why I watch this show. I didn't, in fact, watch a lot this season - I kept up with recaps, but I just couldn't bear to watch it play out. I finally watched this one, not realizing it was the cliffhanger before hiatus, and I was reminded of why: it's the little acting moments. When Stef was ranting at the end, the way Lena sharply yelled her name to get her to look at Callie, then the cut to Callie rocking with tears rolling down in the dead silence, almost inaudibly keening, then back to the look on Stef's face when she realized - that sequence was a punch in the gut even more powerful than a minute later when Callie said the accusation was true. That's what keeps me coming back to this show - they don't do big plotlines well at all, but the little moments of character building and payoff are amazing compared to any other show out there.
ETA: I was really disappointed, though, that they never really brought out the idea that Jude might be bisexual. It was almost all framed as "not gay any more?" or "only gay for Connor". Bisexual is the most obvious answer to me, so I'm really disappointed that wasn't the angle they pushed.