The Turtles find themselves flung into the past of Jolly Olde' England, needing the help of London's most famous Detective to make their way home.
Tropes
- Amateur Sleuth: Leonardo seems to take to Sherlock-style deduction rather well.
- Time Travel for Fun and Profit: Moriarty's plot is to use his time machine to ensure that Sherlock was never born, then change history so that he rules the world. The Turtles even get to experience an alternate present where he rules the world.
