I remember watching The fault in our stars which is a great movie, but the wrong math at a very emotional scene, ruined it for me. Shailene Woodley (who has cancer) says this to his boyfriend who also has cancer-
“I am not gonna talk about our love story because I can't. So, Instead I am gonna talk about maths. I am not a mathematician but I do know this. There are infinite numbers between $0$ and $1$. There's $.1$ and $.12$ and $.112$ and an infinite collection of others. Of course, there is a bigger infinite set of numbers between $0$ and $2$, or between $0$ and a million. Some infinities are bigger than other infinities. A writer we used to like taught us that. There are days, many of them, when I resent the size of my unbounded set. I want more numbers than I'm likely to get, and God, I want more numbers for Augustus Waters than he got. But, Gus, my love, I cannot tell you how thankful I am for our little infinity. I wouldn't trade it for the world. You gave me a forever within the numbered days, and I'm grateful.”
A very good movie but , just saying, if you are not a mathematician, infinities are the first thing you should avoid.