The shirt that Claire gives Danny has a hole in the chest, suggesting it belongs to Luke Cage.
When Claire says Kun Lun is full of karate hunks, Davos corrects her and says kung fu not karate. Iron Fist was based on the popular television series of the time, Kung Fu (1972).
The episode is rated 12 for mild violence, marking a first for an MCU Netflix series, as opposed to Felling Tree with Roots (2017) with an 18 rating.