EW Staff
October 03, 2013 AT 10:23 PM EDT

Tonight, The Vampire Diaries returns for its fifth season (8 p.m. ET on The CW). How well do co-stars Nina Dobrev and Kat Graham know each other? We found out by playing an EW newlywed game with them on the set in Atlanta. Watch the video below, and you’ll also learn why Graham threatened to kill Dobrev. (Spoiler alert: our headline.)

Come back next week to see Ian Somerhalder and Candice Accola in the hot seats.

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