The Plain Man's Guide to Advertising - 1963 is rated/received certificates of:
UK:U
Hide in Plain Sight - 1980 is rated/received certificates of: Finland:K-12 Iceland:12 USA:PG
MASK - 1985 Treasure of the Nazca Plain 1-61 is rated/received certificates of: Australia:G
In Plain Sight - 2008 Her Days Are Numbered 3-10 is rated/received certificates of: USA:TV-PG (L)
The song is "Everything's Changing" by Keane.
The coastal plain
Plain Jane - 2010 is rated/received certificates of: USA:R
Plain Jane - 2004 is rated/received certificates of: Ireland:12
Hiding in Plain Sight - 2012 is rated/received certificates of: Singapore:PG
Plain Truth - 2004 TV is rated/received certificates of: Australia:M
Pirates of the Plain - 1999 is rated/received certificates of: Iceland:12 UK:PG USA:PG
Plain Clothes - 1987 is rated/received certificates of: Australia:PG Iceland:12 UK:PG USA:PG
Skippy - 1967 Plain Jane 2-30 is rated/received certificates of: Australia:G
Just Plain Folks - 1936 is rated/received certificates of: USA:Approved USA:Passed (National Board of Review)
Hide in Plain Sight - 1980 is rated/received certificates of: Finland:K-12 Iceland:12 USA:PG
In Plain Sight - 2008 Pilot 1-1 is rated/received certificates of: Netherlands:12
MASK - 1985 Treasure of the Nazca Plain 1-61 is rated/received certificates of: Australia:G
In Plain Sight - 2008 Duplicate Bridge 2-7 is rated/received certificates of: USA:TV-PG