The full effectiveness of Bruce's new interrogation techniques is revealed in the Justice League Unlimited episode "The Once and Future Thing Part Two: Time, Warped".
The Batsuit suit has now a built-in rebreather, which was presumably installed after Terry almost drowned in Lost Soul (1999).
This marks Shriek's last appearance in this series. He later makes a cameo in the Justice League Unlimited episode "Epilogue".
Dak mentions Blight, Spellbinder and the Royal Flush Gang.
This is the only episode where Terry and Dana kiss.