SECOND WAVE TP VOL 01 plus THE DARK KNIGHT RETURNS:

plus THE DARK KNIGHT RETURNS: THE LAST CRUSADE #1

AVENGERS (1963) #4

But the discovery that the Nazis have not only discovered the same weapons but have improved upon them leaves a terrible hole in their ability to mount a defense

a defender of Earth and a human being

aliens and their own future selves - but never all at the same time

SECOND WAVE TP VOL 01 plus THE DARK KNIGHT RETURNS:by Michael Alan Nelson & Chee Mankind held back the first Martian invasion but then came the Second Wave! Now one seemingly ordinary Earthman, his wife and home taken by the invaders, stands between us and alien forces now immune to mankind's defenses! What secret does this man hold that will save us from extinction?