<P> Terry initially hides Bruce's identity from Max, but Max already has enough information to deduce that Terry's employer is actually the original Batman . In "Where's Terry?", when Terry goes missing in Gotham's maze of subway tunnels, Bruce and Max look for him together and manage to come to an understanding regarding their respective importance to Terry, although Bruce steadfastly refuses to allow her to become involved in rescuing Terry . </P> <P> Terry flirted with several girls throughout the show, but his main love interest has always been Dana Tan, his long - time girlfriend . In the episode "Big Time," she recognizes Charlie "Big Time" Bigelow by sight, suggesting that Dana and Terry knew each other since their early teens, although in "Rebirth", Terry's mother notes that Dana, Terry's "friend", left him her number, suggesting that they became an item over the course of the series . Despite their commitment to each other, their relationship is strained as Terry struggles early on as Batman to balance his dual obligations . The two have been on the verge of breaking up several times, especially before Terry meets Melanie Walker, AKA Ten of the Royal Flush Gang, but despite being close to breaking up several times over, Dana somehow manages to forgive Terry for his absences, believing that Terry sees Bruce Wayne as a father - figure and doesn't want to fail him . The two are usually shown together many times through the series, including the motion - picture movie Batman Beyond: Return of the Joker . </P> <P> However, as the Justice League Unlimited episode "Epilogue" reveals, Terry ultimately grows into full acceptance of his role as Batman, and somewhere along the line discloses his secret to Dana . Despite knowing his secret, Dana shows to have accepted his double life and is willing to be with him, even if her safety is threatened . She is also frustrated with the fact that they have been dating for years and have not married . Although it takes him some time to get over his fears for her safety in the event that his identity is ever compromised, the episode ends with Terry planning to propose to her . </P> <P> In the comics, it was revealed that Dana had a brother named Doug who led an assault on Gotham as the leader of the Jokerz . Dana requests Terry and Bruce's help in finding him, but Doug manages to kill thousands of people by sending a large group of Jokerz as suicide bombers around the city . Doug confronts Dana and her family in the hospital (after he fractured their father's skull), but before Doug can kill them, Bruce manages to call Batman in to save the Tans, eventually resulting in Doug's death . Batman's rescue led Dana to figure out that Terry was Batman and what his connection to Bruce was . Bruce and Terry trusted Dana enough to keep the secret, and Dana's family agrees to implant Bruce with Doug's liver to save Bruce from dying of liver failure . </P>

When does dana find out terry is batman