Lucas Barr is the son of Andrea Barr and the grandson of Sheriff Jake Devins. After watching his father die, Lucas stops talking. |
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When Peter Sweeney's spirit begins killing people in Lake Manitoc, it appears that Lucas is in some way connected to Peter's spirit and he is able to give Sam and Dean clues through crayoned drawings. Lucas seemed to form a connection with Dean, who shared the trauma of watching a parent die. It was also Dean who ended up saving Lucas from the spirit Peter Sweeney in Lake Manitoc. Only when the spirit is at rest does he start talking again, and Lucas learns an invaluable lesson from Dean: "Zeppelin rules".