Travers Humphreys (as The Right Honourable Sir Travers Humphreys P.C.) receives 'and introducing' credit.
During his sixty year legal career, Travers Humphreys was involved in the cases of Oscar Wilde, the murderers Hawley Harvey Crippen, known as Dr. Crippen, George Joseph Smith, the 'Brides in the Bath' murderer, and John George Haigh, the 'Acid Bath Murderer', among many others.