“Captain Brassbound's Conversion” is a play by George Bernard Shaw, an Irish playwright who became the leading dramatist of his generation, and in 1925 was awarded the Nobel Prize in Literature.

The play explores the relationship between the law, justice, revenge and forgiveness. Sir Howard Hallam, a judge, and his sister-in-law, Lady Cicely Waynflete, a well-known explorer, are at the home of Rankin, a Presbyterian minister. Sir Howard tells Rankin that his brother's property was illicitly seized after his death by his widow's family, but Sir Howard has now recovered it. Lady Cicely decides to explore Morocco with Sir Howard. They are advised to take an armed escort.