|Introduced||Galactica Discovers Earth, Part II|
|Children||2; Willie (son) and unnamed daughter|
|Walt Griffin is a Cylon|
|Walt Griffin is a Final Five Cylon|
|Walt Griffin is a Human/Cylon Hybrid|
|Walt Griffin is an Original Series Cylon|
Griffin is skeptical of his son's claims made over dinner, however he later investigates the field where his son claims to have seen them. After a while searching in the field during nightfall with flashlights, Griffin threatens to discipline Willie for making up stories, until he sees the ships himself and subsequently notifies the local authorities. After bringing the sheriff out to the field at night, he apologizes for not believing Willie, despite the fact that the Vipers left the meadow just as they arrived with a police officer (Galactica Discovers Earth, Part II).
When the Vipers later reappear in the meadow, Walt instead calls the United States Air Force, which removes the ships from the field to the Van Nuys A.N.G. Base. Both are told by an Air Force Colonel to keep the existence of the craft secret (Galactica Discovers Earth, Part III).