Learn about the secondary characters we've seen in the past who will show up in season 4, episode 1, The Beginning of the End.
Karl
Karl is one of the Others and Alex's boyfriend whom Ben put into Room 23, presumably to brainwash him and keep him from getting Alex pregnant.
At Alex's wish, Karl went to the Losties to warn them that the Others were coming to take their women. He traveled with Jack's group to the radio tower. For more on Karl, including a picture, see Karl's Profile.
Naomi Dorrit
Naomi parachuted onto the island and was rescued by Desmond. She claimed to have been sent by Penelope Widmore to find Desmond. Naomi has a satellite phone and went with Jack's group to the radio tower. Before Naomi could call her freighter, however, Locke killed her with a knife. For more on Naomi Dorrit, including a picture, see Naomi Dorrit's Profile.
Randy Nations
Randy was Hurley's boss at Mr. Clucks and later his employee after Hurley won the lottery. Randy was also Locke's boss at the box company. For more on Randy Nations see Randy Nations's Profile.
Christian Shephard
Christian Shephard was Jack's alcoholic father. Jack had been in Australia and was bringing his father's body back to the states when the plane went down. Jack thought he saw Christian on the island.
Christian is also Claire's father, though Claire never knew his name and neither she nor Jack know that they are half brother and half sister.
Previous to the crash, Christian had hired Ana-Lucia as a bodyguard. He'd also talked to Sawyer in a bar at one point. For more on Christian Shephard, including a picture, see Christian Shephard's Profile.
Mike Walton
Big Mike was the officer partnered with Ana-Lucia. Shortly after Ana-Lucia returned to work after being shot and losing her unborn child, Ana-Lucia drew her weapon inappropriately and Big Mike was very upset with her. For more on Mike Walton, including a picture, see Mike Walton's Profile.

