The popular Nickelodeon cartoon debuted a new 15-minute episode Thursday on the popular social website.
Nick said Wednesday that "SpongeBob SquarePants" has more than 16 million 'friends' on Facebook.
Those friends were given instructions how to view the episode, which is titled "Trenchbillies" and guest stars Amy Sedaris, Thursday.
The hour-long "Legends of Bikini Bottom" then premiered in prime time Friday.
It will be repeated, adding the Facebook episode, for its Sunday morning fans.