TVLine – You’re about to find out exactly why Tuesday’s episode of Shadowhunters (Freeform, 9/8c) is titled “Malec.”

TVLine has a steamy exclusive clip from the penultimate hour of Season 1, which finds Magnus (Harry Shum, Jr.) making one final attempt to stop Alec (Matthew Daddario) and Lydia’s unholy union.

“Emotions are never black and white, they’re more like symptoms,” the lovesick warlock explains. “You lose your breath every time they enter a room, your heart beats faster when they walk by, your skin tingles when they stand close enough to feel your breath.”

Magnus puts in a solid effort, but the question is: Will his desperate plea end with a kiss… or a kiss-off?

We also spoke with Daddario about this momentous occasion, an interview we’ll post Tuesday morning.