Mark your calendars! NBC has set a date for Saturday Night Live's three-hour 40th Anniversary Special: February 15, 2015. Right now, it's uncertain which cast members, past or present, will appear on the late-night bash, but NBC Chairman Robert Greenblatt noted, "This special is just one of the many ways we plan to celebrate SNL's historic 40th season next year." You know what this special really needs?Continue reading…