- take too much space in the database
- take too much time for entering
why do you want to type the title each time you add a vehicle rather than having to type the title once, and have the site find it when you type the episode number?

I didn't say that the whole thing was a bad idea, I just said that if I add it, it would be a more automated solution. Of course it would be a little more work to add it to the site than just adding a new field, but it would work better too.