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 additional episodes.
Source: fakedestielfan — Twitter