The tall guy is a genius. He doesn't relate well to human feelings, but has a girlfriend that understands his "limitations" and keeps trying to make the relationship physical...
You would enjoy the show if you get into the story line...
Most of the characters in the show have PhD's and one guy has a masters in engineering. The PhD's are always looking down on him and teasing him because he's not one of them. However the engineer has more things in real life than the PhD's as their research is just theoretical...