Picture Previews: Mon 12 Jan - Fri 16 JanTuesday 30 December at 10:42pmThis week on the Street: Barlow's Buys gets trashed, Gavin's secret is in jeopardy and Michael has a big question for Gail...Fake Gavin hides behind the bar when the real Gavin's ex-girlfriend, Lisa, calls in the bistro looking for him.Apparently Gavin is a cheating, two-timing scumbag...Gavin might have some explaining to do...Later, Steph is dumbfounded as Gavin explains he's not actually Gavin, but Andrew, a friend of Michael's son. Will Steph make him tell Michael the truth?Meanwhile, Gail and Michael head to the hospital for his test results.Seizing the day, Michael plucks up the courage to get down on one knee and propose to Gail. Taken aback, how will Gail respond?Liz and Steve return from Spain but Liz confides that her concerns for Steve have only deependedJust as Mary settles the twins down to do their homework, they're interrupted by Julie wanting to play games. How will Mary react?Luke tries to win Liam over with a new football. Will it work?A man breaks into Barlow's Buys and trashes the place.How will Tracy get out of this one?Later, Tony suggests to Tracy she could save her business by allowing him to become a partner. Will she be forced to agree?This week on Corrie