At 38:40 Miss Sherlock tells her nemesis "Come to the Reichenbach Building". Reichenbach Falls in Switzerland is the scene of the apparent death of Sherlock Holmes at the end of "The Final Problem".
At 22:37 Miss Sherlock enters the password "baskervilles" on a computer. Perhaps the best known of Sherlock Holmes' cases is "The Hound of the Baskervilles".
At 38:50 Wato-son is driving a car with left-hand drive, which is very rare in Japan where traffic is on the left side of the road and right-hand drive is the rule.