George Takei shared a story reflecting on his close friendship with fellow "Star Trek" actor Nichelle Nichols, who died at 89 over the weekend. The 85-year-old actor wrote a tribute via Facebook to honor the late actress, noting how she supported Takei and his husband during their 2008 wedding. "When my husband Brad and I got married, we asked Walter Koenig, who played ensign Chekov on the show, to be our best man at the wedding," he wrote on Monday.