Danny, his friends, and the Berenstain Bears go to another place in Europe, but this time in London, England where they meet the greatest mouse detective, Basil of Baker Street, and together they must save England before it goes to the hands of Professor Ratigan and help a little mouse girl name Olivia and find her father which Ratigan bought back to his hideout in order to build a mouse robot to look like the queen.
- This is the first episode of Danny's Adventures The Berenstain Bears appear in.
- Basil is revealed Timothy's uncle.
- Dumbo makes his appearance.
- Unlike any other Great Mouse Detective Adventures, no one works for Ratigan.
- Just like Timon and Pumbaa's Adventures of The Great Mouse Detective, Olivia bites Ratigan's hand.
- This is in honor of the film's 25th anniversary.