RED ROBIN #20

Red Robin finally combines forces with his former teammates in a 2-issue crossover with TEEN TITANS that kicks off right here! Is there even enough room for Tim Drake and Damian Wayne – the new Robin – on one team? Meanwhile, Catman and the Calculator have their own agendas for this highly anticipated reunion! Catman is hired by Mikalek to steal back the Unternet, and when he does it alerts Red Robin. Tim tries to stop him but Catman escapes and puts Tam into danger. Tim tries to get to Tam's place but is too late to stop a Calculator robot from blowing it up. After making sure Tam is okay, Tim contacts the Teen Titans for help in stopping what appears to be over 140 Calculator robots around the world. Then next day Red Robin and the Teen Titans head to Istanbul, where they send Damian in as a scout. He learns that the Calculator's head-quarters are under a busy nightclub. That night the team tries to get inside but are discovered by a Robot-Calculator, who blows up. The team then finds themselves surrounded by dozens of other Robot-Calculators ready to explode. Continued in TEEN TITANS #92! — Description from Comic Vine community (comicvine.gamespot.com).