Scott: What happened, sir? You only left a moment ago. Spock: We were successful. Guardian of Forever: Time has resumed its shape. All is as it was before. Many such journeys are possible. Let me be your gateway. Lt. Uhura: Captain, the Enterprise is up there. They're asking if we want to beam up. Capt. Kirk: Let's get the Hell out of here.
Kirk & Spock return from the past through the Guardian then McCoy returns through the Guardian.