The Sevens Ghosts

The fourth episode of the third season of the series is called "The Seventh Ghost" (orig. "Sevens Ghost").

Minogue and O'Leary chase ghosts dressed as Wally and kidnap bystanders. The police manage to detain two of them, but they escape. The officers find their van, but Minogue is abducted by ghosts who turn out to be rugby fans who died in a car accident years ago. O'Leary and Parker find an old friend of the ghost fans, a survivor of a car crash. The ghosts appear, and their friend explains to them that they are dead. After freeing Minogue, the ghosts leave for another city for their party.

The episode shows several ghosts of people who died 20 years ago in a car accident on the way to a sports match. For some reason, they decided to go back and finish their journey.

The ghosts attack people in similar clothing, hoping to find their friend who escaped death. They do not realize that they died because they were very drunk at the time of the accident (and continue to drink alcohol even after death, despite the fact that they are sick).

Ghosts can interact with the real world (touch living people and objects, be in handcuffs, etc.), while they are not visible in the photos. After being told that they are dead, they become aware of their nature and gain the ability to disappear and move through space. They travel in a ghost car, in which they can put someone from the living people and move in space with him. The car may even crash into the house, but the traces of destruction are an illusion and disappear with it.

The ghosts find peace and continue their journey after finding a surviving friend and finding out that he is not going to go with them.