Related Clues:

• ''Unknown,'' on a sched.
• Up in the air, on schedules
• Letters of indecision, on a schedule
• Schedule abbr
• TV sched. letters
• Program guide abbr.
• TV-sked placeholder
• Abbr. in TV listings
• Schedule ref.
• Sched. unknown
• Unfilled-slot abbr.
• Unspecified, in TV listings (Abbr.)
• Sched. question mark
• Sched. notation
• TV sched. notation