villains planned to force Owen to cooperate with the team by administering the same mind-controlling agent that Deathstroke had used on his daughter as well as Batman's partner Cassandra Cain. However, this plan fell apart when Rose escaped and helped the Teen Titans defeat the Rogues, which led to Deathstroke backing out of the deal. Owen has also developed a close friendship with Supergirl, Kara Zor-El. After Supergirl returned from her time away with Power Girl, Kara began looking to start a normal life on Earth and went out a 'date' with Owen, during which they spoke of their past problems. Kara has nicknamed Owen 'Boomer'. Although the pair often flirts with one another, they have never progressed to a romantic relationship. This comes primarily from the fact that Kara continues to show interest in Nightwing, and jokingly says that what she and Owen has is more of a brother-sister relationship, in which he has an unhealthy fixation on his 'little sis'. Feeling rejected after Kara's relationship with Power Boy, Owen goes to a bar where he meets Cassandra Cain (Batgirl), who at the time was being mind controlled by Deathstroke the Terminator, and who had been hired to kill Supergirl. Cassandra kidnaps and tortures Owen to lure Supergirl. Unfortunately, this proves unnecessary, as Kara had tracked down Cassandra on her own, without any knowledge of Owen's kidnapping. Batgirl nearly manages to defeat Supergirl, but is defeated when Kara grows Krypton Sunstones which impale her foe. Kara then rushes Owen to the hospital where he is treated. While still in medical care, it is discovered that Power Boy has been stalking Kara. Following Kara's rather violent break-up with Power Boy, the Earth was overtaken by spirits from the Phantom Zone, which began to emerge from within Superman. Kara managed to defeat the Phantoms and return the Earth to normal. Afterwards, in Supergirl #19 Kara begins to make amends with all the people who she has hurt since arriving on earth. Amongst them, Boomer, to whom she apologises for letting him get hurt and leading him on. During this conversation, the matter of Owen's relationship with Kara is finally clarified. When asked by Kara how he feels about her leading him on, Owen replies, "Well, if I may ... for me to have been 'led on' would presume I thought I had a shot with you ... For me to think