If you're a fan of Nathan Fillion and Alan Tudyk from "Firefly" or "Dollhouse," you may enjoy their appearances in Spike TV's new series, "PG Porn." The parody videos star both prominent actors and adult film actresses, and promise entertainment for people who like everything about porn... except the sex.

Fillion stars in "Nailing Your Wife," a fairly dark skit where he channels all the bad acting that you expect from adult entertainment, and Tudyk is a total delight in "High Poon," which is PG -- but with some R-rated language. You may also enjoy "Helpful Bus," a porn site parody where Craig Robinson from "The Office" and Sean Gunn from "Gilmore Girls" offer nice young adult actresses rides in their big sketchy van for totally wholesome reasons.