This episode is heavy on family, drawing parallels among the many issues that different sets of siblings have on each other. The trigger is Diggle‘s discovery that his brother, Andy, is alive and apparently one of Hive’s minions. Having extracted said brother from the organization with the help of #TeamArrow, it remains to be seen how he will deal with his errant sibling.
Oliver‘s sister, Thea, is feeling the return of her bloodlust but was able to discover that Damon Dark is a way for her to control it. Why she asks Malcolm Merlin, not her brother, for help I just don’t understand.