The Clock King scrapes Batman's chest with his sword, tearing his bat symbol apart, but in the following shots, his suit is back to normal, and no tear can be seen.
The big clock at the episode's climax features a flaw: 11 reads as IX (should be XI).
The street sign reads "T0th St" rather than "10th St) as Alfred drives Bruce to the bank.
(at around 16 mins) Fugate has Mayor Hill tied up on the clock hand, and tells him that he will be crushed when the clock hands meet at precisely 3:15. The minute and the hour hand of a clock actually come together at slightly past 3:16 because the hour hand has covered some distance at its slow pace when the minute hand had traveled during the 15 minutes. A time maniac like Fugate should have known this fact about clocks.