Derived from the 1947 movie with the same name, a house is haunted by a deceased sea captain who wreaks havoc with the new tenants who were not advised of his existence.
Cast:Hope Lange , Edward Mulhare , Reta Shaw , Harlen Carraher , Kellie Flanagan , Scruffy , Charles Nelson Reilly , Mason Curry , Guy Raymond , Dabbs Greer , James McCallion , William Lanteau , Kathleen Hughes , Dan Tobin , Gil Lamb , Kenneth Mars , Alice Ghostley , Irwin Charone
Mrs. Carolyn Muir rents charming Maine Gull Cottage for her family and finds that it comes with a resident ghost. Captain Gregg takes a shine to the pretty widow and allows them to stay in his house.
When a young couple on the way to their wedding end up staying the night, Captain Gregg thinks they should get married immediately.
After an appeal to the vanity of their landlord doesn't work to get needed repairs made, the Captain sends him on a treasure hunt in the very areas that require fixing.
Unknown to Mrs. Muir, she gives access to Gull Cottage to a ghost hunter looking for the spook that inhabits it. When she learns her mistake and orders him out, the ghost hunter turns nasty.
The local historical society wants to erect a statue of legendary local Navy hero Captain Figg. Captain Gregg is insulted that he wasn't chosen and wants Mrs. Muir to expose Figg as the coward he was, but Mrs. Muir must have proof.
Vanessa Peekskill, the great-great-granddaughter of Captain Gregg's true love, comes to Gull Cottage to research their romance, and the Captain is quite taken with her.
Claymore switches the Captain's antique barometer with a fake and sells it to some antique hounds. Captain Gregg switches them back and Claymore is arrested for fraud.
Mrs. Muir's Uncle Arnold who sells magic tricks comes for a visit. Candy asks for him to stay and perform at her birthday party until they find his tricks don't work and his stories grow old and stale fast.
Mrs. Muir's appearance in a local stage production leaves the Captain lonely so he decides to disrupt the performance.
Captain Gregg reluctantly consents to removal of the antiques and replacing them with modern furniture to make the cottage a home, but when she has his prized monkey puzzle tree cut down after a window is broken the angry Captain leaves.
Mrs. Muir needs money to fix the plumbing and can't come up with a single idea for an article, so the Captain collaborates with her on a story, but his secret revisions start giving people the wrong idea about her.
The Captain and Mrs. Muir are continually interrupted by life's little chores while they try and have some quiet time together.
Captain Gregg lends a hand when Martha shows more than a passing interest in the local dentist.
A former beau literally sails back into Carolyn Muir's life on his yacht and asks her to marry him much to the jealously of the Captain.
Prompted by her family doctor, Carolyn sees a psychiatrist, who convinces her that the Captain is a delusion she should ignore. When the psychiatrist shows up at Gull Cottage, the Captain takes delusion into his own hands.
Everyone knows that the Captain and Scruffy don't like each other, and the Captain's really in the doghouse when Scruffy mysteriously disappears.
Claymore has an accident, hurting his back, and ends up convalescing at Gull Cottage, running the Muirs ragged.
When Jonathan accidentally tells Carolyn's visiting in-laws about the Captain, they believe he's a living person and jump to the conclusion that Carolyn plans on marrying him.
The Captain's face is being used on the label of a new brand of chowder, and both he and Mrs. Muir are annoyed but for different reasons.
The Captain's attempt to make up for interfering in Jonathan's education involves scrimshaw, a parasol, a loan from Claymore, and a lot of regrettable secrecy.
Taking a job at the Schooner Bay Beacon, Carolyn finds herself overworked by the editor. The Captain misses her, and has never forgiven the Beacon's inaccurate reporting of his death.
Carolyn's distraught friend Aggie comes to visit after breaking up with her fiancé. Carolyn and the Captain set her up with Claymore.
Jonathan's history essay wins first place, but when he changes the essay to reflect facts the Captain provides, he stirs up resentment and puts his prize and the family's peace in jeopardy.
Carolyn comes down with a bug, and Captain Gregg, dissatisfied with the doctor, concocts his own remedy which sends Mrs. Muir back to the mid-1800's where she is the "ghost" and the very much alive Captain is the only one who can see her.
The kids find a clock with a curse on it. After the clock is started the last living Gregg will die at midnight, Claymore Gregg.
The Captain is continually interrupted when trying to read Carolyn his poem for her, but her rapt attention to a singer-songwriter stranded at Gull Cottage gives the Captain an idea for getting his poem heard.