In the original script, the villain taken to Arkham was going to be the Mad Hatter, but Robert N. Skir argued that Scarecrow would help establish the idea of the Arkham inmates being afraid of Lock-Up. But once he learned that Mad Hatter was voiced by Roddy McDowall, he gladly scripted the scene with Mad Hatter. Unfortunately, his argument about Scarecrow was actually taken into consideration and the script was rewritten with Scarecrow instead, much to Robert's dismay.
The original title of the episode was going to be "Locked Without A Key"; which is also one of the lines spoken by Lock-Up in the episode.
Robert N. Skir wanted to name Lock-Up differently. His real name would've been "Jason Bolton", based on the character "Jason Bolts" from the western comedy series "Here Come the Brides". The codename would've been "Deadbolt". However, since Lock-Up's name was the part of the original outline by Paul Dini, it couldn't be changed.
Robert N. Skir also based Lock-Up upon Travis Bickle, the main character of the 1976 film "Taxi Driver".
Voice Acting[]
Loren Lester, the voice of Robin, also voiced the Maitre d' but was left uncredited.
During the final scene where Lock-Up is being taken inside Arkham, the laughter of various inmates, including the Joker can be heard. Since Mark Hamill is not credited in the episode, it's unclear if he recorded the laughter or if it was a pre-recorded laughter.
The line of dialogue by Harley Quinn when asked about Lock-Up's performance as security chief mirrors the dialogue by the Joker in the episode Harlequinade, when he bids "nothing" for the nuclear bomb. This was deliberately done by writer Robert N. Skir after listening to the Joker's recording from that episode.
Releases[]
"Lock-Up" has been released twice as part of the following Home video sets;
