The fourth season of Saturday Night Live, an American sketch comedy series, originally aired in the United States on NBC between October 7, 1978, and May 26, 1979. 　　The entire cast from the previous season returned. This would be the final season for Dan Aykroyd and John Belushi. Aykroyd and Belushi left to work on the film The Blues Brothers. 　　The season four DVD was released on... (展开全部)