Stargate Atlantis - 2004 Critical Mass 2-13 is rated/received certificates of: Netherlands:12
Mass - 2004 is rated/received certificates of: India:UA
Mass - 2005 is rated/received certificates of: Canada:14+ (Ontario)
Mass Moving - 2007 is rated/received certificates of: Belgium:KT
Boulder Mass 'The Levitation' - 2013 is rated/received certificates of: USA:Approved
WMD Weapons of Mass Deception - 2004 is rated/received certificates of: Australia:M
Mass Appeal - 1984 is rated/received certificates of: Australia:PG Finland:S Iceland:L USA:PG West Germany:12
Mass Effect Paragon Lost - 2012 V is rated/received certificates of: Australia:MA15+ Germany:16 New Zealand:R13
Boston Legal - 2004 Witches of Mass Destruction 2-6 is rated/received certificates of: Argentina:13
Weapons of Mass Distraction - 1997 TV is rated/received certificates of: Germany:16 Iceland:12 UK:15 (video premiere) USA:R
No, critical mass does not depend on polarity. Critical mass is simply the amount of fissile material needed to sustain a nuclear chain reaction. Polarity, which is a property of molecules, does not play a role in determining critical mass.
Critical Mass - Catholic rock - was created in 1996.