He nodded at her comment about the Doctor, completely agreeing, but he was watching Catwoman with a mix of awe and disbelief at the visit, as she started to leave the apartment. Doug found it difficult not to stare; partially because she had a beautiful figure and he couldn't stop noticing it, but also because of what she represented... that weird mix of freedom and responsibility, of doing more to help people than could ever be asked of a person.
Not knowing what else to say, Doug motioned with his hand, halfway between wave and salute. "Good luck out there."