Warning: Spoilers for Hawkeye Episode 5 follow below.Florence Pugh made her triumphant debut on the Marvel Studios Disney+ series “Hawkeye” in Wednesday’s episode, which opened with a flashback that filled in the gaps of how her character has spent her time since we last saw her in “Black Widow.”Pugh’s Yelena Belova first appeared in this summer’s Marvel movie “Black Widow,” playing the adopted sister and fellow black widow to Scarlett Johansson’s Natasha Romanoff.