Main Characters Billy MacGregor Dr. Harold Samuels Bernadette Meara Maria Borges Arvid Engen Darlene Merriman Simone Foster Jawaharlal Choudhury Alan Pinkard Eric Mardian Sarah Nevins Dennis Blunden Janice Lazarotto Alex Torres Viki Amory Theola June "T.J." Jones Jasper Kwong Aristotle McKenzie Charlie Moore
Recurring Guest Characters Billy Chin 2 guest appearances Nichelle Nichols 1 guest appearances Dave Nash 1 guest appearances Mr. Bartholomew 1 guest appearances
