A man dressed as Santa Claus climbed through a KFC drive-through window before robbing staff at knifepoint.
CCTV footage has captured the moment the man entered the fast-food restaurant in Alfreton, Derbyshire, on 19 December.
The robber brandished a knife and demanded money before leaving with cash.
He wore a red hat, trousers and jacket over a black top.
His face was covered by black tights or stockings.
The man is described as being about 5ft 10ins tall and stocky.
Anyone who recognises the man is asked to call Derbyshire Police.