Complex sentence: In season 3 episode 1, Helena, in projected form, persuades Myka to return to the Warehouse, and in episode 5 while lending her assistance in a case, shares her regret over past actions.
Split into simpler sentences: In season 3 episode 1, Helena, as a hologram, persuades Myka to return to the Warehouse. And in episode 5, while lending her assistance in a case, she shares her regret over past actions.