DD1 is 4 and has watched things like Spiderman, cartoon and real actors. She watches the Simpsons including tree house of horror episodes. She's never been violent, didn't even have a hitting/biting phase as a toddler or had nightmares or trouble settling and is clued in to the fact there is a difference between TV and reality. It has been a good opportunity for discussions about the real life consequences of things that might not be shown or whether it would be okay to act in the way a character has. I wouldn't let her watch things like that alone, I think it is important to be there to answer questions and give further input into the distinction from reality etc.

Of those listed, I'd be comfortable with things like Narnia, Star Wars, Lord of the Rings, TMNT. I dont think she would be interested in the Matrix, I think the concept would be a bit beyond her comprehension at this point to be enjoyable or discussion worthy so leaving aside anything else I just would think pointless introducing till older. I haven't seen the others so can't judge, I wouldn't let her watch something I or DP hadn't first seen if it isn't just a g or pg.

Will need to see what DD2 is like before putting an age on it for her, she has as close to 0 screentime as possible. I imagine around 4ish too though I think it does depend on the child and the way they respond to this sort of thing.

We are probably the extreme end of relaxed in regards to this though and I would never show anything to another child, I think it is up to the parents of course. In my mind, I think having an open and honest dialogue is more important than what they do or don't watch.