Justice was first performed in the UK at the Duke of York's Theatre in London on February 21st, 1910. It could have been earlier if Galsworthy had not fought so hard to keep the play's final line "he's safe with gentle Jesus!"
Due to its controversial subject matter, the first performances were attended by many influential people, including the then Home Secretary Winston Churchill. Churchill would late cite Justice as one of the major influences in the subsequent reforms of the British penal system.
The original cast included Sydney Valentine as James How, Charles Maude as Walter How, Edmund Gwen as Cokeson and Dennis Eadie as Falder.
The play was first performed on Broadway at the Candler Theatre in New York on April 3. 1916. According to the Broadway Database (please see link below) John Barrymore played Falder, Charlie Francis played Walter How, O. P Hogge played Cokeson, and Henry Stephenson played James How.