S1·E8 The Apartment

Planning their last will and testament together brings up the subject of Paul's old bachelor pad, which he now sublets to Cosmo Kramer (guest star Michael Richards). Jamie wants Paul to get ridden of his apartment, but Paul is against that. They get into a fight, which results by Paul deciding about the future of his apartment and Jamie getting ridden of her t-shirt from her past (which she later wants back).