Slade said "NIghtwing is a hero...he was once Robin, but left his mentor. Ive dealt with your team a lot....whether is was through my family...or a contract I had with help." Slade then asked "Tell me....did my other self ever work with a girl named Terra?" Slade remembered the previous events perfectly. He took the contacts out of respect for his son. 

THe Doctor leaned against the TARDIS and continued thinking. What was it that this person wanted with them. What was they had to offer. The Doctor walked by with a needle. "I need a blood samplefrom everyone. No questions. I need it to figures out why we were chosen."