Although the freshman drama has struggled somewhat in the ratings -- owing partly to its Friday-night timeslot and a weak lead-in from Joss Whedon's "Firefly" -- FOX likes the show enough that it has picked up "Doe" for a full season. Its situation is similar to that of "Fastlane," which was also picked up this week.

In its seven airings thus far, "John Doe" has averaged just under 7 million viewers -- not great numbers, but not bad either given that Friday is one of the lightest TV-viewing nights of the week and that its lead-in, "Firefly," is also struggling, averaging only about 5 million viewers.

Australian actor Dominic Purcell stars as Doe, a man who wakes up alone and naked on an island near Seattle knowing everything about the world except who he is. After making his way to the city, he helps a pair of skeptical detectives (Jayne Brook and John Marshall Jones) with their cases while searching for clues to his identity.