Six months to a Cybertronian is infinitesimal, in all honesty. Though there's no shortage of expression to be read in Starscream's features and body language. For metal face plates, they seem to have just as much range of motion as any human face, and the various countenances are all familiar ones.

"Amoi," Starscream echoes, but there's no recognition there. "It was another world like this one? You arrived there unwillingly, away from your own dimension?"