extraterrestrial beings

After Susan sees Mr. Smith the substitute teacher peel off his face, she knows he's an alien and only Peter believes her; together they work to save the class from Mr. Smith's horrible plans.

Seventh-grader Duncan must find out which of the four new teachers in his school is an alien before his brains get fried to a pulp.

Rod and his bratty cousin Elspeth are snatched into another dimension by the monstrous alien Smorkus Flinders.

Peter, a typical seventh-grader, finds himself touring the planet with his friends Susan and Duncan, and with three aliens in disguise. Their mission is to file a report that will report the Earth's future in the universe.

The Bailey School kids are going to find out if the art teacher with braces on her teeth is really an alien from outer space.