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lyle hershey was an actor that appeared on will and grace
Karen's husband, Stan Walker, has remained an unseen character over the course of the show. He is described as an extremely overweight man with some unusual sexual tastes, who gives a lot of business to Pizza Hut and Taco Bell. Jailed during season four for tax fraud, Stan was released in season five, but Karen soon caught him sleeping with his British mistress Lorraine Finster (played by Minnie Driver), whom he met when she worked in the prison cafeteria. During Stan and Karen's divorce proceedings at the end of season five, Stan dropped dead, and season six saw Karen explore other avenues of dating, culminating in her 20-minute-long marriage to Lorraine's father, Lyle (played by John Cleese). At the end of the seventh season, it was revealed that Stan faked his death and, in season eight, he and Karen reconciled after she had a brief affair with a government agent (played by Alec Baldwin).
this was found :
http://en.wikipedia.org/wiki/Will_&_Grace