Marcus eyed Elizabeth as she now had blonde hair. Marcus turned to Elizabeth and eyed her carefully. Something felt wrong and he knew it but he was willing to act on his curiosity here. If he was gone too long, the bus or someone else was going to know he went missing with Elizabeth.
Skynet in his world had asked him to perform a mission of peace, or neutral terms with the leader of the Resistance he knew to make sure Parnell didn't take over its systems.