Welcome to A2K, coutho. Generally we don't do homework.
I wouldn't have picked "Flatliners" for philosophical issues. Your best bet would be Kubrick's "Dr. Strangelove" or "A Clockwork Orange." I get a big zero for any philosophy in "Flatliners," a potboiler albeit somewhat entertaining film based on the philosophical core of "Seinfeld."
Another more current film would be "Dogma."