"What's interesting about what's happening right now is the dynamic between the brothers," he said. "The episode coming up is really about these brothers overcoming their disdain for each other.
"[They're] ultimately realising that family is really embedded into the fabric of who we are and if you can connect with that it's really powerful."
However, Somerhalder added that Elena (Nina Dobrev) will continue to come between the vampire brothers.
"This whole Damon-Elena-Stefan thing is coming to a head," he said. "Stefan (Paul Wesley) knows that there are feelings flying around between the three of them and he's man enough to understand that this is a symptom of love and how complicated it can be."
The Vampire Diaries airs on Thursdays at 8/7c on The CW.