SPECIAL: For four years now, CBS has shown a pair of colorized episodes of I Love Lucy: one of them always the aptly named “The Christmas Episode,” from the classic sitcom’s final season in 1956, and the other a newly computer-colorized episode from the Lucy canon. Tonight, the new color-enhanced oldie is “The Fashion Show,” from 1955. It’s the one in which Lucy, linking with several other show-biz wives, puts on a fashion show – despite having a painful sunburn on the big day (pictured).