From A Wiki of Ice and Fire
|Died||In 300AC, at Beyond the Wall|
|Book(s)|| A Storm of Swords (Appears)|
A Feast for Crows (Mentioned)
A Dance with Dragons (Appears)
|Played by||Burn Gorman|
|TV series||Season 3 | Season 4|
A Storm of Swords
Clubfoot Karl is a member of the Great Ranging, the force that left Castle Black in search of the wildlings. He is one of the conspirators who intend to kill Lord Commander Jeor Mormont. He is to cut the tethers amongst the horse lines. Karl survives the Battle of the Fist of the First Men. He supports Dirk during the mutiny at Craster's Keep.
A Feast for Crows
A Dance With Dragons
Clubfoot Karl and the other betrayers wander in the Haunted Forest, planning to head south over the Wall. However, the traitors are killed by Coldhands and his ravens. Summer, Bran Stark's direwolf, finds the bodies and eats parts of the meat. 
In the TV series a character appears that seems to be based on the Clubfoot Karl, though in the series he is named Karl Tanner and is played by Burn Gorman.