Related Clues:

• Gumshoes
• Lt. Columbo et al.
• P.I.'s
• Clue hunters, slangily
• Hired sleuths, slangily
• Private eyes
• Professional snoops
• Private investigators, for short
• Private eyes, for short
• Sleuths, slangily
• Shadows
• 23 Across et al.
• PI's
• Film-noir heroes
• Sleuths, for short