A have-a-go hero was left hospitalised after stepping in to break up a fight.
The victim, a 30-year-old man, received serious leg injuries after intervening as two men became involved in an altercation on Cross Church Street in the town centre at 4.30am on Saturday, July 23.
Police have released a still from CCTV of a man they would like to speak to in connection.
Detective Constable Craig Foulkes at Kirklees CID said: “I would appeal to anyone who recognises the man in the CCTV image to come forward with any information they may have.
“Enquiries into this assault remain ongoing and anyone who recognises the man or who has any information should contact Huddersfield CID on 101 referencing crime number 13160315800.
“Information can also be given anonymously to the independent Crimestoppers charity on 0800 555 111.”