Possible Clues:

• 'Orange Is the New Black' rating
• Rating for 'Game of Thrones' and 'House of Cards'
• For 17+ viewers
• 'The Walking Dead' rating
• Rating for many Showtime series
• "Better Call Saul" rating
• "True Blood" rating
• "Rescue Me" rating
• Like "Nip/Tuck," rating-wise
• Adult cable rating