Mister Miracle is a minor character in Harley Quinn and a New God with the uncanny ability to escape any trap.
In the episode "Inner (Para) Demons", he had a show in New New Gotham where he was to escape his shackles within 5 minutes, or he would fall to his death. The performance was crashed by Harley Quinn and her crew when Doctor Psycho convinced Harley to steal his Mother Box to open a "Boom Tube" to Apokolips to get a parademon army from Darkseid. Psycho developed a whole plan to get it from him, but Harley just went to his dressing room and grabbed it before going on stage and beating him up.