Family Guy: Be Careful What You Fish for

"Be Careful What You Fish For" is the fourteenth episode of the tenth season of the animated comedy series Family Guy. The episode originally aired on Fox in the United States on February 19, 2012. When Peter and the guys try to salvage a sunken Mercedes-Benz, Peter half-heartedly promises a favor to a helpful dolphin. Soon, the dolphin moves to Quahog but outstays his welcome at Peter's. Peter tries to reunite the dolphin with his ex-wife in hopes that he will return to the ocean. This episode was written by Steve Callaghan and directed by Julius Wu. It guest stars Ricky Gervais, as the voice of Billy Finn the dolphin, and Lucy Davis as the voice of Joanne Finn, the dolphin's ex-wife. Both Gervais and Davis starred together in the original British version of The Office.