The following phrases are all anagrams of the same two words. Can you figure out the two words, and then think of a familiar four-word expression which serves as the clever title for this puzzle.

DRUG HEAT
HUG TRADE
THUG DARE
EGAD RUTH
DUG EARTH
HUGE DART
THUD RAGE
HATE DRUG

Answers:

The two anagrammed words are THE GUARD.

Title: CHANGING OF THE GUARD.

Credit: Nancy Salomon
CHANGING OF THE GUARD