Due to the popularity of the "Submarine Chapter" that aired in the fall of 1994, a special mini-program was created for Christmas. "Po's Christmas," broadcast late on Christmas Eve, is a story lasting just over five minutes. Although it was initially planned to conclude within a year, the series resumed in August 1996 after receiving numerous passionate messages from viewers. "Stray Sheep's Great Adventure," including special episodes, continued for a total of 13 installments until December 2000.