It depends. 'Till' could refer to different things. If it's a specific book or film title, you'd need to check its background to determine if it's based on real events or fictional.
Hard to say. It could be inspired by real-life incidents but might have been fictionalized for dramatic effect. You'd have to look into the background and author's intentions to know for sure.
Some cable networks or specialty channels could air it. Also, some online documentary websites might have it. You'll have to do a bit of searching around.
Not sure. It's possible that 'Till' takes some cues from real-life situations, but it's often a blend of fact and fiction to make it more engaging for the audience.