Lisa Swain suddenly feels like she’s standing between two worlds — and Tia Wardley’s secret in the shadows may be the key to unlocking it all.

In recent developments, viewers have begun to hear the name Tia Wardley — a woman who was hired by DI Costello to appear as Becky’s advocate, putting Lisa and Carla in a confusing situation.

According to information from the wiki, Costello paid a person to impersonate Tia Wardley to appear before Lisa and Carla, to reinforce the image of “Becky is a good person, not involved in the scandal”.

But now, Tia Wardley suddenly appeared… for real.

No longer a “constructed ghost”, but a living person — who holds in her hands top secret files, recordings between Costello and Becky, and even photos of Becky and Carla exchanging small talk behind Lisa’s back. Tia finds Lisa in the dark, handing her a USB drive with the words “The truth behind Becky is here.”

Lisa, shocked beyond words, inserts the USB drive into her computer, and opens the files: audio recordings of Costello discussing with someone “helping Becky fake her death,” emails exchanging passwords to access police files, and a plan that had been deleted to protect the reputation of a high-ranking official. Tia Wardley claims she was coerced into cooperating—Costello forced her to appear as evidence in support of Becky, but Tia was really a “scavenger”—covering up, erasing traces, and clearing the way.