Torn DV mini tape what do I do now?

I would go to a professional camera store like a Ritz and see if you can find splicing tape, yes they sell such a thing but it may be a bit hard to find, if you find it youll have to pick a point on either side of the damaged tape and cut it as cleanly as possible and apply the splicing tape, when played thecut out part will of course be missing and the tape may jump over that point a little but it should work.