Trivia: The inscription on John Winchester's gun is Latin, translating to "I will not fear evil."
Trivia: The Metallicar is a 4-door 327 4 barrel Small Block Engine 1967 Chevy Impala.
Trivia: Sam and Dean are named after their mother Mary's parents, Samuel and Deanna.
Trivia: Jeffrey Dean Morgan plays John Winchester, father of Dean Winchester (Jensen Ackles). In real life, Morgan is only 12 years older than Ackles.
Answer: Angels themselves may not have genitalia, but their vessels do. Nephilim occur when an angel in a vessel reproduces.
Greg Dwyer