Bates escapes Iris and Caitlin by transforming himself into a little girl in episode 1x19 "Who Is Harrison Wells?".
Barry walks across the street into a park and sees himself confronting Savitar who is holding Iris hostage in episode 3x09 "The Present". Barry and Cisco vibe into the future to review the events Barry witnessed in episode 3x10 "Borrowing Problems from the Future". Cisco vibes Wally to the future to witness events for himself in episode 3x15 "The Wrath of Savitar". Appears in 2 more episodes.
Source: fakedestielfan — Twitter
Clive is sharing a meal with Agent Bozzio when Major and Liv approach them in episode 2x06 "Max Wager". Major parkours through the park to get to his dog in time in episode 2x11 "Fifty Shades of Grey Matter". Clive talks to Dale before being joined by Liv and later he walks through the park with Dale and they talk about their issues in episode 4x02 "Blue Bloody".