The Orville tackled this really well, IMHO, in the episode where Scott Grimes’s character went back in time to the 21st century and started a family. When the Orville crew went back to find him, he didn’t want to go back because he made a life for himself in that time. So the crew instead went back in time again to a previous point before Grimes founded his family and retrieved him then. The interesting part was that the implication was that the timeline where
Grimes had the family would cease to exist once this happened, based on Grimes’s character acting afraid about his former crew’s actions. But they never actually showed that timeline disappearing; it was just hinted at.
Grimes had the family would cease to exist once this happened, based on Grimes’s character acting afraid about his former crew’s actions. But they never actually showed that timeline disappearing; it was just hinted at.