Pimento had returned from hiding in the beginning of season 4 when Figgis was finally captured, but for some reason he never returned in season 4 after episode 7... that is, until episode 21, when Pimento shows up for a few short scenes where he helps Rosa and Jake take down a dirty cop.

Do Rosa and Adrien get married?

It is the 74th overall episode of the series and is written by Andrew Guest and directed by Nisha Ganatra. ... In the episode, Adrian returns from protection and he and Rosa decide to get married the next day.

Does Adrian come back for Rosa?

Rosa reveals that she's worried about why Adrian hasn't returned yet. Rosa waits at their meeting point for him periodically throughout the episode but he never comes.