The second Mick caught onto what he was saying, Cisco's breath caught in his throat. Because there was that look, that cautious one that was standing somewhere near the edge of hope, but refusing to cross the line and dive headfirst into. He's pretty sure he had worn that look when he asked Barry to go back so he could save his brother that first time.

"I don't know," he shrugs and shakes his head, "I won't make promises I can't keep, but-- I wouldn't say it was impossible. I mean...given everything we..." He glances over his shoulder to see where Mick is staring, distracted. As he turns back toward the older man again, there's a flicker of blue at the corner of his vision, but a subtle glance back shows nothing. "everything we know about how weird timelines and time in general can be." he finally finishes his earlier interrupted thought.