Jack

Jack is one of the three protagonists of the sitcom Rabbits. He is an antropomorphic rabbit and wears a suit with a tie and brown shoes. Throughout the series he constantly talks about him having a secret and both of the female rabbits unsuccessfully try to encourage him to tell it. The secret seems to be related to an inevitable event that all three of them are expecting. He also mentions twice a man with green-colored clothes. Inland Empire 's Janek, Mr. K and Darek are sometimes interpreted to be Jack himself disguised under human form.

Rabbits
Every time he enters the house he is received by a round of applause. He has a secret, but he asks if there were any calls. He hears a light tapping outside and exits. The rabbits seem to be waiting for some inevitable event which apparently has happened before and it's possibly related to Jack's secret. He remembers "a man in a green suit" (afterwards he mentions "the man in the green coat" again.). He asks Suzie if she used to be blond. About the event, he says: "When it happens, you will know." When the phone rings, he gets up and answers. He then hangs up the phone and sits back again. In the fifth episode he performs a ritual similar to the one Suzie performs in the third episode.

Inland Empire
He appears as part of the sitcom which is being watched on TV by the Lost Girl. Aside from the excerpts of the series that are shown throughout the movie, he has no lines original to the film. He leaves the house and enters Nikki Grace's mansion. He disappears and right afterwards Janek appears in the same room, sitting on a chair where The Phantom asks him for "an opening".

After Suzie brings the lit candles and Jack disappears from the house, he is seen entering Mr. K's office and sitting at the desk. A couple of shots later he had already been replaced by Mr. K.

Later on, the rabbits' phone rings. Jack, who is sitting on the couch with Jane, gets up and answers. Sue is on the other end, yelling for Billy. The audience laugh.

After the Polish men's séance has finished and Piotrek had left the room. There is a match cut. Darek turns into Jack, while the other two Polish men turn into the other rabbits.

When Nikki kills the Phantom outside the rabbits' door. Jack is standing. The door begins to open; they all turn. A bright light is seen coming from outside.

More Things that Happened
Jack is on the phone in the Rabbits' home, while Suzie irons and Jane sits on the couch as usual. Jack is listening in on Nikki's call to Devon, while the Phantom's voice torments her. Jack hears a horrible buzzing. Jack says "There's something here". It is unclear whether or not Nikki hears Jack, but she immediately tells Devon, "There's something here."

After Nikki's friend tells her story about entering an unrecognizable hotel to have an affair, Jack is seen walking down the hotel hallway from Axxon N., now seen in full color. He walks down a staircase and exits out a door.

Trivia

 * Although Janek appears to be a manifestation of Jack in the Mansion scene, Janek later appears in the same room as Marek, who is also a manifestation of Jack. However, it is also implied in Scene from a David Lynch DV Project that bilocation is possible in that universe.
 * Scott Coffey also appeared in Lynch's prior film, Mulholland Drive.