My prediction: Claire and Marten adorably watching flick. As it ends, they're looking into each other's eyes and contemplating intimacy. Phone rings - Faye's in hospital.
Alternate: Marten returns from date and discovers Faye unconscious and in serious condition. During trip to ER he realizes his date (as well as general distraction from new relationship) put Faye in danger.
No they didn't. If that happened, FAYE put Faye in danger. He isn't her keeper, he's her friend. And while yeah, while we should look after our friends, we also have our own fucking lives.
I think people are forgetting that Marten doesn't have the information that we have. He didn't see her wake up and reach for a bottle. He didn't see that she was already hiding bottles in her room without even realizing it. He saw her drunk in the middle of the day ONCE. Even Dora has seen slightly more than that, but it still isn't a lot, she asked about drinking on the job, which could be taken as a joke, and then she came in in the morning smelling like booze, which is probably the most alarming thing that anyone has actually seen.
We have access to waaaaay more knowledge than the characters do. Now if Marten, Dora, and Pintsize all got together and shared what they've seen, they would probably have a more complete picture, but even then WE WOULD STILL KNOW MORE THAN THEY DO.
Now, he may feel GUILTY about not being there, but that is irrational. He didn't put her in danger.