Although Emily Hartley (Suzanne Pleshette), wife of Chicago psychologist Bob Hartley (Bob Newhart), had announced that she was pregnant at the end of The Bob Newhart Show's fifth season, it was decided to drop this plot strand when the series was unexpectedly renewed for season six. Thus, when the series returned in the fall of 1977, no mention was made of Emily's delicate condition, and the show proceeded as though the announcement had never been made. Of the 21 episodes shown during season six, several are standouts. The opener, "Bob's Change of Life," finds Bob and Emily having a lot of trouble adjusting to their new apartment. "Ex-Con Job" was the first in a handful of episodes wherein Bob treats a group of convicts who are involved in a work-release program. In "Who Was That Masked Man," Bob's habitual henpecked patient Mr. Peterson (John Fiedler) declares independence from his shrewish wife. "My Son, the Comedian" finds the Hartley's neurotic neighbor Howard Borden (Bill Daily) agonizing over his 12-year-old son's decision to become a standup comic. And in "Group on a Hot Tin Roof," another of Bob's patients writes a play featuring some disturbingly familiar characters. As part of his agreement to extend The Bob Newhart Show for a sixth season, Newhart insisted that CBS allow him to be absent from a handful of episodes. This explains why Bob Hartley is out of town "promoting his new book" in the episodes "A Girl in Her Twenties," "Emily Carlin, Emily Carlin," and "It Didn't Happen One Night." The series officially comes to an end with the extra-length finale "Happy Trails to You." But as any TV aficionado can tell you, The Bob Newhart Show did not actually have its final episode until the surprise denouement of the star's next sitcom, Newhart.