They’re ‘on a Mission from G-ahhd!’ Not ‘God’, let alone the high-English, biblical epic ‘GAUGHD’, but pure Chicago Ethnic-Catholic ‘G-ahhd’. The Blues Brothers follows siblings Elwood Blues (Dan Aykroyd) and fresh-out-of-prison ‘Joliet’ Jake Blues (John Belushi) as they try to re-unite their blues combo. They do this in order to raise $5,000 to save the…