The Lesser Evil (S01E21)

Allianora, known as the Woman in Black, reaches out to Darien and invites him to join the Organization, known as Chrysalis. Hesitant at first, Darien is shown classified Agency documents revealing plans to replace him with a more compliant Gland recipient. Upon further investigation, he confirms the information and learns that he was actually intended to be the successor for his predecessor. Staying loyal to the Agency, Darien attempts to infiltrate Chrysalis, even accepting their mission to "kill" Allianora, suspecting the bullets are blanks. While they are indeed harmless, she grows suspicious of his intentions after he appears willing to eliminate her. Darien then tries to access Chrysalis' computer systems but gets caught. Just before they can extract the gland, Allianora rescues him, igniting the HQ in flames before vanishing again.