Mind Reader is standing in the middle of the park, sweating. They do not know why they're here, and obviously none of the people around them do, either. The truth is, they were on their way to the grocery store and got lost and then forgot. It happens.
But, then, they see Precog on a bench and Precog is thinking of them, because Precog had a vision of meeting Mind Reader here today. Of course, Mind Reader thinks, they were here to see their friend! They sit down next to Precog. Precog knows Mind Reader's name. Mind Reader can pick up Precog's name. They have a long and stimulating conversation, like they've known each other forever, courtesy of mind reading and future seeing. Precog assumes this is because Mind Reader also foresaw this. About halfway through, Precog starts finishing Mind Reader's sentences before they say them, and Mind Reader is picking up thoughts like 'it's wonderful to meet someone with the same abilities as me.'
They part ways with a promise to meet again for a coffee/rube-goldberg-esque prevention of a kidnapping.
Normal Guy is just walking home from a Revolutionary War reenactment. They see Time Traveler walking the same way, also dressed in old-timey clothes.
"Oh, hey," they say, "were you just at the battle of such and such?"
"Why, yes," says Time Traveler, "did you also come from [year]?"
"You could say that! Do you live around here?"
"I do, for the moment. We should get lunch sometime and talk about yesteryear!"
Precog encounters Time Traveler for the first time while breaking in to the corporate offices of a fabulously corrupt company. As in, they are both breaking in, and for the same reason. Thing is, Time Traveler has 'seen' Precog before! Precog thinks Time Traveler means 'seen' as in vision, but, nope!
Turns out that in the future, Precog foresees that Time Traveler needs some help with something similar, makes a lot of 'seeing the future' jokes that the Time Traveler misinterprets, and doesn't register that his old friend doesn't recognize him at all, because, hey, Mind Reader reacts to him in the same way whenever they meet up!
Of course, Time Traveler and Precog want to introduce their other powered friends... Normal Guy and Mind Reader will definitely get along! They have the same powers, after all!