If anyone thought Lisa Swain had finally found some peace, Coronation Street proved otherwise.

After dinner at the Bistro with Carla, Lisa suddenly felt a chill run down her spine when she realised she was being followed.

In the dim light of the street, she caught a glimpse of a woman standing on the other side – and viewers immediately assumed it was the “lady in blue” Roy had seen.

The brief moment was enough to send viewers into a tizzy.

Many fans claimed that Lisa was absolutely right to feel someone was following her, and that the person was the real Tia Wardley. If this theory is correct, everything Lisa had believed in – from her emotional account of Becky to her comfort that her wife was a good person – could collapse in an instant.

For Lisa, it was a crushing blow. She had been torn all this time: was Becky really innocent, or had she betrayed her family by falling into corruption? But now, just when she believes Becky is a good person, the appearance of the “woman in blue” throws everything into chaos.

Meanwhile, Carla – who is gradually becoming Lisa’s support – is also worried. Both now have to face not only the pain of the past, but also the risk of being caught up in a new conspiracy. And if the “real Tia” decides to come forward, the truth may be even more shocking than anyone could have imagined.

Coronation Street has once again proven its mastery in sowing mystery. With just a shadowy figure, the entire fan community has exploded with a series of theories. Is Lisa ready to face the truth, no matter how painful it is? And more importantly, what will Costello do next when his act is at risk of being exposed?