it was heavily implied that cooper's son stayed on earth, in the novelization he dies decades before cooper appears in cooper station.
and yeah, interstellar is an incredible film. it is quite possibly Hans Zimmer's greatest work. The composition is incredible. People seem to let minor flaws overshadow an incredible film overall. If this movie bored you then the film wasn't made for you, you ADHD having motherfukkers go see these hardcore scifi films and then complain about being bored. Go fukking see a michael bay film or some shyt instead please.
Lol I love the fact that people don't like this has to mean they have a disorder like ADHD. I thought it was incredibly average Nolan has never impressed me with character development and it seems like he feels forced to insert emotionally baiting scenes but it really doesn't seem like he understands human relationships. That being said there were a lot of cool shots to impress people so if u liked it more power to you.