11. 'Twas the Night Before Mxymas

It is Christmas Eve and Lois and Clark are getting ready for the first Christmas dinner at their home with family and friends but things get weird when an imp from the fifth dimension named Mister Mxyzptlk ( Howie Mandel ) appears and wants to conquer the Earth by making Superman leave. Mxyzptlk traps Metropolis in a time loop where everyone lives the same day over and over again and no one remembers it except Clark. Clark tries to figure out what is happening and Mxyzptlk tells him that every time people live the same day they lose a little of their hope and when the hope is lost completely, Superman will not be necessary to them.

Clark tries to break this loop asking Lois' help for whom it is hard to believe at first what Clark says. Clark manages to rekindle Lois' hope and frees her from the time loop and the two of them work together to free everyone else as well. They give everyone their hope back and trick Mxyzptlk into going back to his own dimension. With the imp gone, the loop is finally broken and everyone celebrates Christmas.