The Batman (Season 4, Episode 10) - Two of a Kind

Harleen Quinzell, a self-alleged doctor, hosts a daytime TV show. But when her show got cancelled due to her frequent insane advises and attacking Bruce Wayne, she swears to have her revenge. But there are some people who love insane advices and Mr. J is one of them. So when Mr. J a.k.a. the Joker saw her show got cancelled, he reveals his identity to her and makes her partner in crime. Now the Bat Team has to stop these maniacs before they can wreck havoc.
 

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