Sanctuary 
Break Down
Before I start, there are a couple of episodes that have errors. Usually small and forgivable. However, something as vital as an end of a season (3rd) mega point has literally been rewritten here. The awful gaffe where Faith asks Buffy "...gonna throw me off the roof...again?" Last time I checked, Faith threw herself off for two reasons. One, so Buffy couldn't save Angel and two, a last-ditch effort for Faith to escape (despite her knife wound).
Also, either the writers dropped the ball, or a scene was cut. Faith tells Buffy that 'Angel said you'd never give me a chance'. Unless it was written then cut for time, or the writers never bothered because they thought the whole Faith/Buffy rivalry etc. would be way too long and complex to get into. Either way, we didn't see Angel tell Faith that Buffy 'wouldn't give her a chance'.
There's also Buffy's laughable tirade on the roof. All she ever was - was a 'friend' to Faith?
One last thing. I really hope the 'second assassin' naturally disappears into oblivion as part of it's species...otherwise. Oops!
We also have Faith feeling guilty over Buffy. "How am ever gonna make it right with her?" It 'feels' a little odd because Faith never has been guilt-ridden before. But then, it's one of the points of the episode.
Okay, going in order, we have one way ticked Wesley. In fact, he's so annoyed at what Angel is doing, that you really kinda worry that he will help the CoW goons. Ironically, it's while Wesley is explaining to them about how much 'good' he's done while with Angel, that he realizes that, knowing what Angel had done in the past, (if he's ANY brains at all) he's got to wonder if Angel's right about Faith. It's his turnaround from his honest belief that there's 'evil' in Faith. What really brings it home is Wesley's pleasure of the '180' when he gets Weatherby with the dart. (An obvious about face).
Faith's reference to her being asleep for eight months could be easily written off as just a comeback. As Joss is fond of saying -'bring your own subtext'- so I did. I believe Faith's letting Angel know how hurt she actually is that no one went to see her while she was in a coma. It bothers her so much and she's buried it (the way she always does) deep inside. I'm sure if you've gone through the episodes in order you know I insist that Faith only says what she wants to say. She told Buffy plainly "How hard did you look?" in This Year's Girl referring to no visits. Here though, it's a subtle response to Angel's suggestion of 'resting'.
One of the high points in this episode for me is Faith's response to being treated with kindness. She really is confused by Angel's gentle manner. She's (in Buffy's own words) 'had it rough' her whole life. She doesn't get the whole fatherly-guidence-protective thing that Angel is doing. Not to be confused by the Mayor treating her kindly. Faith was truly mixed up and I'll always be the first to defend her, but she knew the Mayor wasn't on the 'good side of the force' (although that was never her reason for being with him). Here, someone is treating her kindly, and is actually on the side of good. So it really confuses her because she never sees herself in a 'good' mix per se. She's still seeing herself as a bad person with no right to ever be treated with kindness. Also, in this part, we have our link to Consequences - when Angel reminds her about 'touching the dark'. It's really wonderfully played and Eliza's reactions are amazing.
Another favorite of mine, is the TV channel flicking. Faith's life in 30 seconds. We have the Black and White movie of a man hitting a woman. This is vital to understanding Faith. That image has most likely been repeated over and over with her throughout her life. She's seen and experienced it. Also taking into account the fact that it's a B&W movie. This shows how she sees things. i.e: black and white. Faith's never been one for a middle ground or fence sitting. She defines things simply. Things are good or bad. Right or wrong. Owed and owing.
Next up is the 'Superman' cartoon. She has openly said and compared Buffy and the Scooby Gang to 'the Superfriends' (Enemies). She most likely wished herself a super hero back in Boston so she could get away from the misery of her life. When she has the chance to be one - she's gone and messed up (She's more akin to the X-Men but I'd be getting onto a WHOLE new topic there). Of course, the last channel is the police, specifically Kate, who is after her, thereby bringing her life up to date.
Next, still in keeping with Bad Girls, we have Faith upset over the blood on her hands. Only, this time, we REALLY get to see how much it bothers her. Obviously, so much so, that she ends up in Angel's arms. Usually, it's just something she notes and writes off. Although, I did extrapolate that it bothered her this much in Enemies - only this time, we get to see it.
Bringing more background to Faith's life, is Buffy and Angel fighting over her. Buffy is 'mom' and Angel is either 'dad' or 'mom's boyfriend'. That's unclear as Faith has never mentioned her father. What is important though, is Faith's reaction. She's frightened of Buffy, and not because of what Buffy might do to her AS Buffy - but as her mom. I honestly believe Faith regresses here. The whole scene - right down to Buffy and Angel hitting each other, is a slice of Faith's life
replayed for us. And for us, we can witness how Faith reacted to those situations. She was frozen in place, most likely afraid of being hit ('...my dead mother hits harder than that!- FHT) -hence her cringing away from Buffy. She even asks... "Don't do this." It is clearly bothering her on quite a big scale. Then, upon Angel's insistence, Faith leaves. Like a child running to her room, Faith watches the scene play out below her. We even have Buffy in a jealous-mother/girlfriend mode. "You did it for her." Not as Buffy though - as Faith's mom fighting with whomever Angel is representing. I think Faith's father protected her from her mom. Or - if it was a boyfriend - he reacted over Faith's mother's treatment of her. I have to confess, I really liked that. It's far broader and obvious than the 'glance' that happened in This Year's Girl. There, we have Faith - having just escaped from the hospital - on the streets of Sunnydale. She notes a lot of things - but what was dwelled on in that scene, was Faith noting a young girl with long dark hair, skipping alongside her father- hand in hand.
Now we get to the roof. Eliza, despite (writing) continuity gaffes, is amazing here. She goes back and forth from totally vunerable, to the Faith we all recognize in seconds. Buffy, keeping us up to speed, tells us that 'she has to clean up Faith's mess', this ties in with 'Faith is my job' in Grad Day 1. (So annoying they get THAT right - but screw up the roof quote). Naturally, a 'reborn' Faith denies this. Also, naturally, Buffy doesn't buy it. She goes on with her amazingly bizarre version of events - tieing in with the 'me me me' Buffy of 4th Season.
Apparently, Buffy 'tried so hard' to help Faith.(!) She did nothing but moan about her from day one! Faith tried so hard to be friends with Buffy, not the other way round. All you need do is look at Consequences to Dopplegangland. In the space of an episode, Buffy gave up on Faith. Buffy never socialized with Faith (We even had Willow saying they should all socialize more). Faith recognizes Buffy's pouty 'oh woe is me' play - and calls her on it. FINALLY telling Buffy some home truths about what it's like to BE Faith. She's confused and honestly feels she has no control in her life. Nothing makes sense to Faith. She's riddled with pain and hate. And she's SO heart-breakingly honest! And Buffy tells her to shut up!! Defeated and not knowing what else to say or do...Faith simply asks Buffy how she (Faith) can "...make it better."
Obviously, Faith was listening to every word of Buffy and Angel's fight because she remembers what Buffy wants most - for her to go to jail. Believing that's how she'll 'make it better', it's exactly what she does. Obviously, not just for Buffy's sake, but for her own. Confession is good for the soul. And Faith confesses to everything - (unseen).