Between Jimmy dating a woman who likes to play in the sewers and Perry dating a woman who seems to have nothing upstairs, Lois and Clark realize they have no one they can do couple things with, until they meet Bob and Carol. They like the same books, foods etc...but there's a reason. 

Bob and Carol were research scientists until Bob had an accident in his lab which causes him to be magnetic, Carol invented a suit to control the magnetic field and they got married and sued the company they worked for, when they were denied any compensation they decided to go after the man who owned the company a recluse who lived a Howard Hughes life by the name of Grant Gandell. Their way in to Grant, Lois. The only reporter allowed to interview the recluse. 

Pretending to be their friends, Bob and Carol edge their way into Lois and Clarks lives and actually start to like them, even though they will eventually have to kill the Kents.