Trevor sends himself and the rest of the Pets on a psychedelic trip when he puts LSD incorrectly delivered by a drug dealer in their cornflakes.
JP is convinced a UFO has landed in the garden, and soon he, Davina and Trevor begin to behave strangely around Hamish.
When Davina is found dead in Hamish's sleeping basket, he is put on trial for murder by Trevor.
Trevor enters Stars in Their Eyes, performing as Marilyn Monroe, much to the disgust of Hamish.
JP discovers an interdimensional time portal in the airing cupboard, which leads to an exact replica of the Pets' house, save for it including a double of JP being the only inhabitant and a highly radioactive uranium mine in the kitchen.
Hamish is convinced the other Pets are throwing parties in the kitchen in the early hours of the morning simply to spite him, and so he begins to spy on them using surveillance cameras.
Trevor holds a séance, and when Hamish sceptically observes it, he is possessed by the spirit of Judy Garland and later the house is tormented by a poltergeist.
Hamish hangs himself and is sent to Heaven, however, he is soon brought back to life by Trevor.
In a retelling of World War II that takes place in the Pets' home, Hamish becomes convinced that a Nazi spy is hiding amongst them.
When JP discovers a copy of the Book of the Dead, he unwittingly places a curse on himself, Hamish and Trevor, which turns them into living mummies one by one, leaving them to rely on Davina to reverse it.
After listening to a Spanish language tape, Hamish begins to act like a stereotypical Mexican man, much to the annoyance of the other Pets.
In order to fend off his boredom, Trevor attempts to conjure Satan, much to the dismay of Hamish.
In a parody of The Godfather, a mysterious package is delivered to the Pets' home, which includes a dead fish and a letter revealing that Hamish has been appointed as the new don of a Chicago mafia.
Trevor takes us on an exclusive and foul-mouthed guided tour behind the scenes of Pets.