Related Clues:

• Small, old, relatively cool star
• Star that's rare, one of seven
• Star, a bit dim, is embarrassed and diminutive
• Small star, pretty cool, of sitcom
• Small star of low luminosity
• Bashful?
• Longest-running sci-fi comedy (U.K., 1988-1999, 2009, 2012-present)
• Sitcom star
• Star with low luminosity