Historical clue formulations

• Villainous army in a 1968 Beatles film — 2018-06-21
• Scoundrels — 2008-09-21
• Malefactors — 2003-10-11
• Malicious ones — 2003-07-19
• Stinkers — 2001-11-01
• Blue "Yellow Submarine" characters — 1994-01-10