Possible Clues:

• TV programme's outlook
• You might need to be more at all, perhaps, to see beyond this
• As far as one can see, this might be a zoo with H.R. in it
• Line obscured by buildings
• Earth/sky boundary
• Where the sky appears to meet the earth
• As far as I can see this line divides earth and sky
• Earth/sky line
• It's as far as one can see
• Line where earth and sky meet