Kirk goes off to walk Lulu but Fiz isn't convinced that their relationship will remain entirely professional. She calls on Sean to investigate. Together they go to see what's really going on. Meanwhile, Thelma wants to show off her Mexican belly-dancing costume to Kirk. She gives him a bit of a show and gives Sean a bit of a fright when he peers through he window! Later, when Kirk emerges from Thelma's house, he gets a smack from Fiz and an ear bashing to go with it! Sally has a close call when Kevin calls her as she's in the process of making out with Ian! She later tells Ian that she doesn't enjoy the lying . . . Katie and Martin talk things through. He's still not entirely convinced that he's ready to be a dad - he says he feels old. But soon Katie brings him round to her way of thinking, she tells him that if he thinks he's too old now then imagine what he'll feel like when he thinks Katie's old enough?! Everything seems to be well again. Martin even gets a bit excited and Kat