Overview: The Secret City Adventures was a series of television programs designed to teach children how to draw. The series was produced by Maryland Public Television and aired on PBS and TVOntario in the late 1980s. The series starred Mark Kistler as Commander Mark who led viewers through various drawing exercises and examples. The show also featured other characters, including Moonbot, Unibear, Pigasus, Furbles, Violet the Dragon, and others. Occasionally, guest artists would appear on the show to demonstrate other art forms.