There is one particular scene that directly mentions (vaguely) the events of "Jessica Jones" with a character that appears in both series. This is a minor thing and only serves to show you that these characters and the location are closely-related. read more
Otherwise, "Daredevil" Season 2 picks up shortly after the events of Season 1 and carries on with the story from the first season. And it's excellent, so I hope you'll enjoy it. read more
Season 1 is important and is a damn good season. No joke, probably the best superhero tv show of all time and it all thanks to season 1. read more