The Old Fashioned Penguin Sandwich

"It is very Mulan Rouge. Every song is the Shrek swamp karaoke," says Atten. "I feel like there's probably five or six minutes that elapsed before a line of dialogue was spoken in March of the Penguins." The documentary, narrated by Morgan Freeman, airs on PBS at 8 p.m. ET/PT Tuesday through Thursday. For more from David Atten click here.