Spooner's mysterious caller must have vanished through a closed door at the left of the room.

Before long, Mary begins to receive strange phone calls from a mysterious, unknown caller.

Each participant would be remembered when the payoff came, so the mysterious caller had stated across the telephone.

Did the mysterious caller ever come for the box with the secret radio in it?

Including one that was looking for the mysterious caller that had reported the plane and the death.

Mulder receives another phone call from the mysterious caller.

I made a mistake to hang up without engaging in conversation with this mysterious caller.

"That doesn't explain why you didn't try to phone me back to find out whether or not I was the mysterious caller," she pointed out.

Jackie however receives a message from a mysterious caller, telling her that he knows what really happened to her mother.

However, one day at exactly 5 a.m, he receives a call from the mysterious caller, who threatens to kill him.