two character in seinfeld that have been played by one actor are:
jack jarmell & the cop in the la episode
georges girlfriend in the doodle episode & peson who gewts him fired when being interviewed for the bra salesman position (actor from drew carey show)
receptionist of the phyical theripest in the kiss hello episode and one of the bank tellers in the invitations episode
The guy with the beard on the phone in the chinese restaurant episode that george wants to fight is the same actor that appears in the puffy shirt episode, he plays the photographer, where george becomes a hand model..