Sherlock Holmes characters List of Sherlock Holmes characters . Unnamed . Boy . This boy stole something from the pie vendor and ran through Doctor Pulaski , Data , and Geordi La Forge . Data commented that this was only a distraction to cover the crime of killing Jabez Wilson . ( ) Bystanders . These bystanders were present when Data solved a crime of a recently found dead man on a street in London . They watched the whole scenario and were shocked when Data accused the widow . Among the bystanders were two prostitute s , two sailor s , and two police officer s . ( ) Dead man . This dead man was found on a street in London by Inspector Lestrade . Data , as Sherlock Holmes , revealed that his wife killed him and he was recently released from prison . ( ) Dead man ' s widow . This woman was the common law widow of the dead man found on a street in London by Inspector Lestrade . She covered herself as a bystander but was accused and convicted by Data who told Lestrade that she strangled her husband after he was released from prison . The widow herself was then imprisoned . ( ) Emissary . This emissary of a foreign government was part of a Sherlock Holmes holoprogram in which Data and Geordi La Forge participated . He was introduced by Inspector Lestrade who told Data that the man was robbed . Data revealed the true identity of the emissary who was not working for , but against the King of Bohemia and used the photograph of the King and his to blackmail him . The robbed photograph was discovered in his jacket . ( ) Gentleman . The gentleman was part of Data ' s Sherlock Holmes program . His brother was found dead and it had been ruled a suicide . Data in the role of Holmes believed that the brother had been killed with a poisoned cigar . When the gentleman protested saying that his brother had left a suicide note , Data pointed out that handwriting could be forged and that the note was written by a left handed person , while the brother was right handed . At that moment , Data tossed the gentleman an object which according to the program he would catch in his left hand proving he murdered his brother . Instead he grabbed it with his right hand which was the first indication that the holodeck was malfunctioning . This malfunction would lead to a confrontation with Professor Moriarty , a self - aware hologram . ( ) Pie vendor . The pie man was a character in Data ' s Sherlock Holmes holoprogram . He followed a boy who had stolen something from his pie stand . Data revealed that this was only a distraction to cover another crime . ( ) Prostitute . The prostitute was in the company of Professor Moriarty when he discovered the computer arch . When Moriarty talked to the arch and it disappeared , the prostitute called it black magic . ( ) Regina ' s mother . This woman was the mother of Countess Regina Barthalomew . While her daughter was on safari with her uncle , she took to her bed , afraid that Regina would be bitten by a tsetse fly . ( ) Regina ' s uncle . This man was the uncle of Countess Regina Barthalomew . He took the Countess on a safari when she was seventeen . The experience made her enamored with travel . ( ) Ruffian . The ruffian was a hologram in the Sherlock Holmes program . He tried to rob Picard and Data at knife point . Data disarmed him , breaking his thumb , and discovered that the ruffian could have killed them , since the failsafe systems were off line . ( )