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ABC has stopped production on a episode of Wife Swap in which a member of one of the swapped families punched his 13-year-old daughter in the face. We think we're finally starting to get a handle on what it takes for a reality show to can an episode.

· Television producers destabilize a family by removing a parent and replacing her with a near polar opposite: OK, basis for entire multiple reality shows;
· Father in destabilized family commits horrible act of child abuse: Episode canceled;
· Contestant commits suicide: OK, likely somber boxing-glove retirement segment to follow. Show trumpets tragic fighter's defeat on website.