but despite the sometimes overly violent scene and i think it great that the show be market towards little tot like my nephew because only child that age can be naive enough not to read into the wise cracking and very subjective manner of the show . okay the main idea be while martin mystery ( the title character ) and his step sister diana take assignment order from their m. o. m. ( mistress of mystery ) via a secret center . upon receive their new assignment each new episode and the duo go about fight the glob goo spew vermin that threaten the earth and but not before martin ruin any new experiment m. o. m. be work on in her office each time they arrive to take their assignment . in one episode and martin decides to go snoop around the center and in the process awaken a giant cave man whom they soon name java ( after java man of course ) and teach him the way of the new world a they add him a a new member of their team . reason you might now want child under the age of ten watch include represent 1. incest there this weird unshakable feeling of incest go on between diana and martin and imho . 2. violence diana physically assaults martin in nearly every episode . 3. ignorance the writer tend to be ignorant about other people culture and therefore reinforce negative stereotype . 4. frightening image some of the monster the sibling have to fight can be unnerving and not to mention and scary . just to mention a few . it air on nicktoons in the u .