We can all agree that Walternate suffered a great loss when his son was stolen, but his calculating revenge scenario doesn't exactly scream "great dad." And sure, Walter, the eccentric genius from our universe, deeply loves the man he raised as his son, Peter Bishop. But Peter isn't his real son. And Walter's crossing over to the other universe to help/kidnap alternate Peter set in motion the demise of both worlds. Yep, not the best move, Dad.—Abby West