Late-night talk shows went back on the air last night, with mixed results. David Letterman, who reached agreement with the striking writers’ guild, had a script and A-list celebrities, while Jay Leno and Conan O’Brien had to improvise or write their own jokes. O’Brien filled time by showing his Christmas cards and spinning his wedding ring on his desk. The writers’ strike is in its ninth week. (AP in Yahoo! Finance)