The fourth season of Newhart aired on CBS from September 30, 1985 to May 12, 1986.
Dick fills in on a kiddie TV program for its ailing host, Pirate Pete. Dick is appalled at Pete's commercialism and inadvertantly gets the programs cancelled. Dick tries his hardest to get Pete reinstated. Meanwhile, George plays a practical joke on Stephanie, adjusting her scale up two pounds.
Michael and Steph break up when Michael realizes he's tired of Stephanie's demanding ways. Dick has difficulties with the WPIV staff when they're slow to direct his show.
Dick covers for Larry when he enrolls in night school and doesn't want the Darryls to know he's improving himself. Joanna obsesses when a travel guide lowers the inn's rating.
A lonely Joanna becomes best friends with Stephanie who insists on a group vacation to lovely Morocco.
Larry runs for Mayor.
Stephanie's father visits the inn with the news that he's left his wife. The town celebrates Colonial Days, an authentic recreation of colonial times.
When Dick's old college jazz band reunites at the inn, he finds that expectations often excede reality.
Stephanie and Joanna open an aerobics club. Problems present themselves when Stephanie appoints herself as the manager and relegates Joanna to custodial duties.
Joanna and Steph are furious with Michael after they peek at his diary and find out what he really thinks of them.
Dick convinces George to quit the Beaver Lodge after the Beavers cheat George out of a prize rightfully his. George starts up a rival lodge to get back at the Beavers.
George joins a Big Brother program and is dismayed when his young protege Mitch is awestruck by Dick's fast paced lifestyle. Michael and Stephanie use a Oujia board.
Michael begins shirking his duties and risks his job when he tries to find a talent to impress his mother.
Larry dedicates his life to Dick when he believes Dick brought him back from the dead.
Stephanie must care for the hotel staff and guests when a measels epidemic sweeps the inn.
The Loudons are spooked when the ghost of Sarah Newton (episode #2) returns to haunt the inn.
Joanna and a decidedly unenthusiastic Dick decide to renew their wedding vows to celebrate their wedding anniversary.
The town panics when it appears the annual Snow Carnival will be cancelled due to a lack of snow. Larry, Darryl & Darryl request $2,000 to make it snow.
Dick is thrilled when a production company expresses interest in making 'How to be a Plumber' into a video. His elation quickly dissipates when the producers decide to recast 'Dick Loudon' because of Dick's shifty eyes and stammer.
George meets his only living relative, Cousin Eugene.
On a lark, Dick submits his newest book to his publisher under the pseudonym he used when he first started writing, Dwight Schmidlapp, only to find it rejected. Dick sinks into a funk when he realizes he's 'coasting' in his writing career.
A jilted fiancee staying at the inn gets a job at the Minuteman cafe. She unwittingly encourages the affections of both Darryls but rejects them for the more vocal Larry. George organizes a citywide campaign when Michael pulls Barnaby Jones off the air in favor of The Secret Lives of Platinum Gold Dancers.
George worries that a new girlfriend, actress Loretta Dupris is only dating him to make use of his handyman skills. TV Producer J.J. buys a Victorian mansion and plans to bulldoze it to erect a space needle.
Secretary Alma amazes Dick, which she fills in as producer.
The Loudons, George, Steph and Michael are invited to Vanderkellen mansion for Arthur's birthday. Art insists Michael sign a pre-nuptial agreement that he refuses to do. Stephanie fears Michael's only dating her for her money. Dick worries when he breaks a music box given to Arthur by Winston Churchill.