What's twice as fun as Beep and Bob? Two Beeps and Bobs

While up too late working on his science fair project, Bob accidentally points a duplication ray at Beep. To his shock, another Beep appears Beep decides the more, the better, so he points the ray at Bob and PRESTO: it's Bob 2 (or Backwards Bob).

At first Bob thinks their clones are creepy, but it doesn't take long to realize that having duplicates comes with perks: they can sleep in while their clones go to class

Then the real Beep and Bob discover a hitch: the Beep and Bob clones are EVIL, and are planning to duplicate an EVIL Earth to rule How will they possibly get themselves (and themselves ) out of this one?