Attack Its Weakpoint: When Walker fights Danny, she eventually kicks his bad leg, knowing he is still in recovery.
Beauty Is Never Tarnished: Despite Colleen, Misty, and Walker getting involved in the climatic fight and each taking several punches and kicks, they barely have any blood or dirt on their faces by the end of it. Meanwhile, Danny and Davos actually look like they've been in a fight.
Call-Back: Remember when Ward said to Joy in season 1 how "people have been known to start over with nothing"? He's doing just that with Danny at the end of the episode.
Combat Pragmatist: A less violent version than usual: Once Misty takes over Danny's fight with Walker, Danny is able to end their fight by slicing a water pipe (simulating rain) and having Misty use her phone flashlight like a strobe, which suppresses her Walker personality and brings out the sweet, non-violent Mary alter.
While Bethany is clearly touched by Ward's apology to her and offer to be there for their child, and is happy for him that he's doing better, she ultimately turns him down and does not get back together with him.
Downplayed with Danny; he and Colleen break up at the end of the episode, but it lacks the finality often associated with this trope, since it feels more like a "taking a break to find ourselves" scenario, with Danny explicitly saying he wants to develop himself into a man worthy of Colleen.
Grand Finale: The series ended up cancelled not long after it's run, making this episode the final one for this series. Though Danny could likely show up in other shows.
While both acknowledge that they love each other and have been through so much together, Colleen makes it clear that she and Danny need to take some time apart to find their purposes, since having a lack of direction has been putting a strain on their relationship for a while now. Danny is saddened by the decision but understands and resolves to better himself so he can be more worthy of her.
While Ward finally speaking at an NA meeting about his problems and implicitly apologizing to Bethany for his behavior is definitely a good step forward, and she is clearly touched by it, she nonetheless turns down Ward's offer to be there for their child and declines his attempts to get back together, since that doesn't erase Ward's awful treatment of her before, and he still has quite a ways to go.
Colleen becomes the new Iron Fist, becomes a nighttime vigilante crimefighter like Danny before her, and learns how to channel her chi through her katana.
Similarly, Danny and Ward go Walking the Earth together, continue trying to find out more about the Iron Fist and themselves, Danny somehow re-learns to use chi again despite not officially possessing the Iron Fist anymore, and like Colleen, learns to channel his chi into weapons (in his case, through guns and bullets in both hands).
After the credits is a short teaser for Daredevil season 3.
Time Skip: The last two scenes take place months later.
Walking the Earth: Danny and Ward do this together at the end of the episode and during the Time Skip: Danny to learn more about the Iron Fist, and for both men to discover themselves and a new purpose in life.
Wham Episode: Colleen gets Danny's power, we find out she's the descendant of the first female Iron Fist, she and Danny break up, Danny goes off to learn the secrets of the Iron Fist, and we get a glimpse of Danny's new powers after a Time Skip. It's a lot of twists for one episode.