I oftened wondered why Mallory never had any doubles. It would seem he was the original Quinn's double and he had some genetic drift that caused him to look different. And if that happened in one universe why not several.

One also wonders how come, ever since our Quinn and that Quinn merged, we've never seen a double of the original Quinn. :)

Or why since the professor was killed we've never seen a double of him. :)

Or of Wade or of Colin Quinn.

or of that punk classmate of Quinn's,y'know the one that drove Auturo up the wall........

Conrad Bennish.

Or Pavel the cab driver.