Suddenly Susan

In a desperate attempt to keep her romance with Jack a secret from the office grapevine, Susan tells bloodhound Vicki that she's dating her dentist, Mort Gerken -- only to have Vicki decide that Mort is cheating on Susan. Meanwhile, Todd challenges Maddy to an IQ test, staking his prime-parking place in the office garage on the outcome; and Luis celebrates his fifth anniversary at the Gate.