A fresh-faced, mom-next-door with a hilarious streak of silliness lingering below the surface, actress Jane Curtin enjoyed the rare honor of a successful television career spanning over three decades. For the latter half of the indulgent 1970s, she was a founding cast member and integral part of “Saturday Night Live” (NBC, 1975- ), a show which would redefine television comedy. In the conservative 1980s, she represented a new breed of independent woman in the Emmy-winning sitcom, “Kate & Allie” (CBS, 1984-1989). The dependably relevant Curtin also made her television mark on the 1990s when she