While making drugs in their kitchen, junkies Kaz and Billy start a fire and are brought into the hospital. Guppy's keen to impress new boss Stitch and, in a rush to get back to other cases, gives the couple's young son Tyler a drink from a bag his mother brought in. When Tyler's condition worsens, Charlie discovers that the bottle contains methadone. Billy's beside himself with worry for his son while Kaz is more concerned about getting her next hit and ends up choosing drugs over them. When Stitch barely reacts to Guppy's news about the methadone incident, Charlie worries that Stitch is a bad influence. Later, Guppy is in awe of Stitch's brilliance in a high-risk op. Selena is still troubled by her recent discovery that she's pregnant so Maggie persuades her to get a dating ultrasound scan that will reveal whether the baby is Harry's or Nathan's. When Maggie reveals that the foetus is 12 weeks, Selena sobs that the baby must therefore be Nathan's. Also, Jeff realises that Dixie is in love with Cyd and tells Dixie: find someone else you fancy and get over it!; Alice is convinced that Tess and Abs are having an affair. VIDEO: Watch a preview for Casualty
