Georgios Papandreou was arrested after a nightime raid at his villa in Kastri. Andreas Papandreou was arrested at around the same time after seven soldiers with fixed bayonets and one with a machine gun forcibly entered his home. Andreas Papandreou escaped to the roof of his house but surrendered after one of the soldiers held a gun to the head of his then 14-year old son George Papandreou.
Seems like that would leave a lasting impression (pun intended).
Both George and more importantly Andreas were deeply involved with the Soviets. Andreas had contacts thru other Greek communists, Theodorakis and possibly Melina Mecouri, with the KGB thru their fronts, esp. the World Peace Council.
Both were traitors to Greece, trying to turn it over to the communists as revenge for the reds being defeated in the Civil War of 46-47.