Oleck!

I was walking back to the cabin from a small trip to the store, incredibly lost in thought, when my laptop, which I had tucked under my arm, buzzed. Opening it, I noticed a spike in time-travel residue. Time: 2020. Age: 52. Location: New York City. A map popped up displaying a body other than my own within 50 feet. I slammed my laptop shut, dropped my bag of fruit, and dashed into the forestry lining the path. In only a few moments I saw the time traveler. "A younger Oleck," I whispered in disbelief. There he sat, alive and well. But not completely well. No, not well at all. A tint of fear shone in his eyes, as well as desperation and hopelessness. Tears streamed down his face as he turned around, "Ben!"
"Oleck?"
"Ben, there's no way!"
"No way what?"
"He can't be stopped, Ben," he said shakily, "he can't be stopped!" Oleck banged his fist on the ground.
"Who?"
As I asked the question, Oleck's voice calmed. He struggled for self-control, then looked up, "I suppose it's not all hopeless. I left right before it became so..."
Of course. Everything he had said the day before thanksgiving flew into my mind.
I ran up to him, "Oleck, Oleck, who is it? Is it Bob?"
"Bob's nothing compared to this. You should run. Run far away." he panted, "but you can't. You're the only one who can stop him."
I almost rolled my eyes, "Why me?"
"Ben, you're the only one who can stop the world from being lost to the ultimate tyrant. The only one." He sighed, and then gave the look of someone who has lost faith in the world, "Ben, don't trust. Never trust. Everything bad comes from trusting people!" he calmed slightly, and said with a different tone "allies change, Ben, allies change. Even close friends must sometimes doubt each other. But don't be mistaken. Evil is evil, even in the mask of good. That is something which never changes." he was silent for a moment, "how is Vanderdecken12?"
"He only has a few more weeks. He's already losing his memory at times."
"Then it is too late. He doesn't have much longer."
I sniffed sadly.
"You know when I die?"
"Yeah,"
"When?"
"November of last year."
"In an attempt to change the future..." he mumbled, "I'd best go tell him then." he pulled out his pocketwatch-time machine. Putting his finger on the button, he smiled sadly, "Ben, you're a good kid. You can do this."
"Thanks,"
And then he was gone.