Spoiler alert, just in case anyone needs it.
I'm a bit late to the party but have read the Harry Potter books and now working my way through the films.
In Goblet of Fire, why does Crouch jnr go to the effort of putting Harry through the Tri-wizard tournament and helping him win (which was not even guaranteed to succeed)? He could have made anything into a portkey and got Harry to touch it with so much less effort. Or am I missing something???