Nothing says Happy Valentine’s Day like a man (or two) possibly falling to his death. “It’s the day before Valentine’s… and Five-0 has a heart-stopping new episode,” the promo for tonight’s Hawaii Five-0 promises. Watch it below. Reaching? Not so fast: What you can’t tell, is that like the rest of CBS’ Monday night lineup, Hawaii Five-0 is actually celebrating Valentine’s Day within the hour. A black tie charity event lets McGarrett (Alex O’Loughlin) pull his weapon while wearing a tux — which is our second favorite look for him (after “emerging from an ocean swim shirtless”).