The next day, the school is nearly finished with the physical exam.
"Excuse me doc, but I need to borrow a blood sample."
"I'm sorry, I can't let you do that. You are unauthorized."
Garfield whispered to the doctor he is Beast Boy undercover.
"Very well Mr. Garfield. Which blood sample would you like to borrow."
"Tara Markov."
Later in Titans Tower...
"Rob! I got the sample!" said Beast Boy.
"Great. Now we have to know if its a match to Terra's DNA."
"How?"
"Batman."
Gotham City...
"Robin."
"Bats. We need your help."
"What do you need?"
"We need to match this to Terra's. If is a match, then that's proof Tara is Terra." said Beast Boy.
"I'll see what I can do." said The Dark Knight.
Later...
"It's a match?!" shouted Beast Boy.
"100% match." said Batman.
"I need to keep the match." said Beast Boy.
"Here." said Batman.
"Thanks." said Robin.
"Anytime." said Batman as he disappeared.
Back in Titans Tower...
Beast Boy held the match in his hand, alone in the common room, hopefully no one can hear him when he said...
"I'll bring you back Terra. I promise."
"You must really miss her." said Raven, surprising Beast Boy.
"CAN I SPEND A DAY WITHOUT ANYONE SURPRISING ME?!"
"Sorry." said Raven.
"Yes I do miss her. But I'm so close to bringing her back."
Raven never liked Terra, that is, when she betrayed them.
"What are you going to do?" asked Raven.
"I'll show her the match tomorrow. If she still doesn't believe me, Plan B."
"What's Plan B?"
"Miss Martian."
"Your 'blood' sister?"
"Not just her..."