Based on Arthur Conan Doyles Sherlock Holmes The Baker Street Four provides an inside look behind the infamous Baker Street Irregulars. Billy Charlie and Tom are inseparable and for good reason. Filled with con men and scoundrels Londons East End is not easily survived alone. Fortunately the three friendsand their faithful feline companioncan count on the protection of Sherlock Holmes for whom they sometimes act as spies. When Toms girlfriend is kidnapped the Baker Street Irregulars must put