In the fourth season-opener, it introduces ""The Colonel"" (guest-star Peter Graves) and Grandma Ruth (guest-star Barbara Rush) back in the Camdens lives as they just returned from being out of the country for six months. Simon surprises his grandparents with his new haircut. Matt decides to move out of the house and gets his own apartment with his friend John Hamilton. Aunt Julie's new husband Hank (guest-star Ed Begley Jr.) gets Matt a job at his hospital working in the cafeteria. Also, a big surprise happens when Eric begins to suffer a mild heart attack due to the stress from his job. Eric spends a few days in the hospital with the support from his family. Within the coming weeks he must take things slow awhile recovering.