If I were to give sci-fi writers or anyone in that creative space some advice, it'd be this: Don't fuck with time. Just stay away. There's very few shows/books/whatever that can pull it off without "going back and fixing it" becoming like literally every episode. or like Voyager's Year of Hell arc, where that entire arc literally does not matter to the overall story, it didn't really develop the characters, and everything at the start of it was reset.
Quantum Leap and Dr. Who are the only two examples I can think of where it works.
