List of Wilfred (Australian TV series) episodes

Adam is invited back to Sarah’s place after a Powderfinger concert, where he meets Wilfred. Wilfred offers him a bong and quickly sizes him up as a lightweight.
After a night of troubled dreams, Adam awakes unsure of exactly what he has got himself into. When Sarah leaves to do some shopping, Wilfred shows Adam the holes he has dug all over the garden, explaining that he has anxiety issues due to Sarah's string of failed relationships. Adam spends the day cleaning the yard. When Sarah returns, she easily convinces him to stay for dinner. Even Wilfred appears to be warming to Adam, providing him with a clean set of clothes and accompanying him to the pub. Over a couple of beers Wilfred questions Adam’s motives, and warns him not to leave Sarah like all her previous boyfriends have done.

Adam and Sarah’s relationship is blossoming. Sarah tells Adam how important it is that he and Wilfred get on well. Adam responds that he loves Wilfred and to prove it he decides to spend some quality time with him.
Wilfred is in his den – depressed. He says that he is very sick and “could be on the way out” (this may have something to do with the pizza Adam bought him the night before). He says that if he dies, Adam will have to look after Sarah. Adam obtains the keys to Sarah's attic, where he and Wilfred have a bonding session – drinking beer, smoking weed, playing pool and watching porn. Later, Wilfred takes Adam on a mission to steal marijuana plants from an illegal plantation. Successfully back at home, Wilfred bemoans his lost tennis balls. Adam offers to climb on the roof and retrieve them, but in doing so he falls and has to be taken to hospital. He wakes to find Sarah by his side. Adam wonders aloud what a wonderful girl like Sarah is doing with a guy like him, but Sarah reaffirms that she loves only him.

Tension is growing between Adam and Wilfred. Wilfred resents the fact that Adam is now spending so much time with Sarah, and Adam is convinced that Wilfred is trying to sabotage his relationship. A covert psychological battle ensues under Sarah's nose. Wilfred urinates on the toilet seat knowing it will get blamed on Adam. In retaliation, Adam successfully plays the hand in warm water trick on Wilfred, to grudging respect. Wilfred begins to dig up old dildos in the garden, prompting Adam to question Sarah about her opinion on sex toys. When Sarah cooks lamb chops for dinner, Adam attempts to lace Wilfred's serve with dog laxative. The scheme goes wrong and Sarah ends up in hospital, thinking she has eaten a "dodgy chop". Feeling better, she suggests that she and Adam should go dildo shopping – but her fantasy is not quite what Adam had in mind.

Sarah and Adam find an old home-movie showing Sarah, Mark and Wilfred playing happily together. Sarah is upset at the memory; Adam suggests that they take a day trip to the beach to help get Sarah's mind off it. However, Sarah takes them to the beach she and Mark often used to visit – this is not what Adam wanted, and an argument ensues. Adam goes swimming with Wilfred, but is caught in a rip and nearly drowns. He is rescued and resuscitated by a pair of surf-lifesavers, who admonish him for not swimming between the flags. Sarah is greeted by some of Mark's former surfing buddies, who are unimpressed with her new love interest. They return to the local general store for a beer, leaving Wilfred outside. Wilfred becomes frustrated with being ignored, and walks off. After talking for some time, Adam and Sarah realise Wilfred has gone. They search until dark, but with the police no help, they drive home devastated after a disastrous day.

After Wilfred displays behavioural problems, Adam calls Jack Underwood, a reality-TV vet. Sarah has mixed feelings about this; she thinks it reflects badly on her as a dog owner. Wilfred talks to Jack; Jack seems to understand him at some level. Jack decides that Wilfred's problems stem from Adam's treatment of him, and his living conditions. Adam buys a bigger kennel. While he is building it, Jack and Sarah talk about Wilfred. Jack suggests that Sarah may have to choose between boyfriend and dog.

Keith, a well known film star and "old friend" of Sarah's, comes to visit and brings extravagant gifts. He also brings his dog, Cyros – a younger and more aggressive hound than Wilfred. Wilfred and Adam both feel threatened by the two interlopers. Keith, Sarah and Adam play totem tennis in the backyard. Keith humiliates Adam, who then plays way too aggressively against Sarah and freaks her out. Meanwhile, Wilfred and Cyros brag in an ever-increasing game of one-upmanship. Eventually Cyros threatens to kill Wilfred and replace him in Sarah's life. Although Sarah is already beginning to tire of Keith's tall stories and self-absorption, Adam and Wilfred believe that they are being usurped, and concoct a plan to deal with the situation. Adam, acting unusually manly, mentions that he is going to the hardware store. Keith predictably offers to go in his stead, in an attempt to show Adam up. As Keith and Cyros reverse out of the driveway, Wilfred feigns being hit by their car. Sarah rushes to Wilfred's aid, and snaps at Keith for being so careless. The pair leave the house in disgrace, and Adam and Wilfred regain their peace of mind.

After Wilfred defecates on his laptop, Adam has had enough. He takes Wilfred for a walk in the park and lets him run off-leash. Wilfred is soon captured by two dogcatchers. He calls to Adam who ignores him – Wilfred realises Adam's sinister plan, and is furious. Adam goes home and explains to a concerned Sarah that Wilfred has been run over and is dead. Sarah is devastated and insists on seeing the body, but he claims to have already cremated and buried Wilfred on a mate's farm. Sarah is undeterred, and Adam is forced to weave a more and more complex web of deceit. Meanwhile, Wilfred is in the pound and on death row. He manages to escape with the help of the other dogs and a sympathetic dogcatcher. Sarah conducts a backyard burial ceremony for "Wilfred" (actually a pile of bloody bones that Adam has obtained from a butcher). When the real Wilfred turns up, the mourners quickly realise that Adam has faked Wilfred's death and chase him from the garden. Sarah later forgives a bruised and battered Adam, as she believes his goal was to save her the trauma of knowing Wilfred had run away.

Sarah is pregnant. Unfortunately, it's not Adam's. Adam moves out and back into his own flat on the other side of town. Wilfred realises how much he misses Adam, and in his anxiety begins to dig enormous holes in the garden. One day, a lawyer turns up at Sarah's house, informing her that Mark's parents have successfully contested his will, and that she has to move out of the house.