Lostpedia, the encyclopedic resource of all things Lost, has a section dedicated to visions: cases where characters from Lost see people they shouldn't see.
Here is the list:
* Christian Shephard, seen by Jack, Claire, Locke and Michael.
* Walt, seen by Shannon, Sayid, and Locke.
* a horse, seen by Kate and Sawyer.
* Dave, seen by Hurley
* Yemi, seen by Mr Eko and by Locke.
* Emily (Ben's mother), seen by Ben
* Claire (if you think she died in the attack on New Otherton), seen by Sawyer, Miles, and Locke
* Horace, seen by Locke.
* Libby, seen by Michael
* Charlie, seen by Hurley
* Jacob, seen by Locke and Ben
It's interesting that there is nothing that all of these 'visions' have in common:
* Some are dead, some not.
* Some are or have been on the island, some not.
* Some are known to the people who see them, some not.
* Some are seen on the island, some not.
* It might be that all are familiar to at least one character who is on the island when the vision occurs: Jacob is the notable exception to this rule, but in his case, we simply don't know.
Note also that at least some of these visions are quite "tangible":
* Christian is shown holding Aaron.
* Kate pets the horse
* Dave and Charlie keeps punching Hurley to convince him he's real.
* Sawyer helps Claire up from the rubble of the house.
So these are not ghosts in the Patrick Swayze sense of the word.
What we can conclude from this is that any character we see in the series might be imaginary or a vision. If a character's presence on the island is hard to explain, we may be more inclined to believe it is a vision.
Which brings us to Anthony Cooper, Locke's father. Cooper's presence and behavior on the island is strange in a number of ways:
* Being a criminal using many aliases, it should be difficult to track him down.
* It would take a considerable amount of time to get him to the island, yet he appears shortly after Locke joins the Others.
* A man known to go to extreme lengths to escape getting caught, much less killed, he seems strangely self-destructive, pretty much provoking Sawyer to kill him.
My theory is that Cooper is, in fact, a ghost, and that he is in fact alive and well in the real world.
Maybe it's this fact that prompts Locke to kill himself when he leaves the island.
Theory by cronopio
Here is the list:
* Christian Shephard, seen by Jack, Claire, Locke and Michael.
* Walt, seen by Shannon, Sayid, and Locke.
* a horse, seen by Kate and Sawyer.
* Dave, seen by Hurley
* Yemi, seen by Mr Eko and by Locke.
* Emily (Ben's mother), seen by Ben
* Claire (if you think she died in the attack on New Otherton), seen by Sawyer, Miles, and Locke
* Horace, seen by Locke.
* Libby, seen by Michael
* Charlie, seen by Hurley
* Jacob, seen by Locke and Ben
It's interesting that there is nothing that all of these 'visions' have in common:
* Some are dead, some not.
* Some are or have been on the island, some not.
* Some are known to the people who see them, some not.
* Some are seen on the island, some not.
* It might be that all are familiar to at least one character who is on the island when the vision occurs: Jacob is the notable exception to this rule, but in his case, we simply don't know.
Note also that at least some of these visions are quite "tangible":
* Christian is shown holding Aaron.
* Kate pets the horse
* Dave and Charlie keeps punching Hurley to convince him he's real.
* Sawyer helps Claire up from the rubble of the house.
So these are not ghosts in the Patrick Swayze sense of the word.
What we can conclude from this is that any character we see in the series might be imaginary or a vision. If a character's presence on the island is hard to explain, we may be more inclined to believe it is a vision.
Which brings us to Anthony Cooper, Locke's father. Cooper's presence and behavior on the island is strange in a number of ways:
* Being a criminal using many aliases, it should be difficult to track him down.
* It would take a considerable amount of time to get him to the island, yet he appears shortly after Locke joins the Others.
* A man known to go to extreme lengths to escape getting caught, much less killed, he seems strangely self-destructive, pretty much provoking Sawyer to kill him.
My theory is that Cooper is, in fact, a ghost, and that he is in fact alive and well in the real world.
Maybe it's this fact that prompts Locke to kill himself when he leaves the island.
Theory by cronopio