Jon's Night Out is the fourteenthUS/twenty-fourthEU episode from the first season of The Garfield Show.
Because he is unable to sleep, Jon Arbuckle seeks the help of a hypnotist, and is accidentally programmed to go to both wake up and sleep when Odie barks.
A crowd is gathered around a construction area. They are focused on Jon, who is sleepwalking on an unfinished tower's girders, managing to avoid all danger by luck. Garfield is following Jon, and trying to wake him up by frantically pressing a button on a controller, but to no avail. Garfield then addresses the viewer, and decides to quickly go back to the beginning of the story.
During the flashback, Jon is suffering from insomnia, and tries several methods to fall asleep. After everything he tries fails, he decides to watch television, and finds a commercial for a sleep therapist named Dr. Somnambulo, who specializes in hypnosis. Desperate, Jon decides to try him. Dr. Somnambulo attempts to hypnotize Jon, which works, despite Arbuckle’s claims that it wouldn’t. Somnambulo programs Jon to sleep when he hears the buzz from a remote control. However, he is inadvertently is programmed to instead fall asleep upon hearing Odie's bark. Somnambulo gives Garfield the buzzer, and warns him that people under hypnosis tend to sleepwalk.
Odie's barking causes several mishaps for Jon, such as falling asleep during a green traffic light and falling asleep during Liz's speech. When it comes to bedtime, Garfield, still unaware that Jon is programed to Odie's bark, tries to put Jon asleep with the buzzer, but only until Odie comes in, does Jon fall asleep. During the night, Jon gets up from bed, and begins to sleepwalk. Garfield and Odie hear him leave, and chase him around town before Arbuckle ends up in a construction site.
Resuming the beginning of the episode, Garfield continues to try and wake Arbuckle up, before finding out that Odie's barking is the trigger for Jon's ability to sleep. After Garfield instructs Odie to wake Jon up. When Arbuckle is awoken, he panics and falls off the girders, but is caught in the firefighters' life net. Later, Dr. Somnambulo undoes the hypnosis, with Garfield secretly making his own personal adjustment. Jon claims that his insomnia is gone, and being well-rested, decides to go for a walk instead of making lasagna for Garfield. However, Garfield's personal adjustment has Odie’s barking make Arbuckle do otherwise.