That's been asked several times before, Lynn, and the answer is always that no middle name was given in the series. In the comics, she's Lois Joanne Lane, but there's no obligation to follow the comics on this - if you need a middle name, invent one.
Though actually there's more reason to assume that she didn't have a middle name, since her gravestone in Tempus, Anyone? just had 'LOIS LANE' on it.
Wendy
