It is unclear why this is so, and whether or not his portrayal of two seemingly unrelated characters has any symbolism.[7] The episode marks the first appearance of actor John Terry, who plays Jack's father, Christian Shephard (the mysterious man who Jack chases in the jungle). In the previous episode, "Walkabout", Christian was played by a stand-in actor, as the character hadn't been cast yet; thus, only the back of his head was shown.[8]