Extreme Makeover: Powell Family

But despite the determination of single mum Carrie who quit her job as florist to grow healing herbs, his diseases continue and life for Keenan remains a struggle. One of the biggest problems facing him is his allergy to the black mould which has permeated their home.

With the family en route to the Big Apple, our designers call in a team of chemical specialists. The news is grim: the mould contaminating the house is declared deadly and the building must be quarantined. The team can only access the building wearing anti-contamination suits and breathing apparatus which is a major setback to the schedule, but great news for Ty who loves the chance to dress up...

When the building is finally declared safe the team can forge ahead with a 400ft² extension. Carrie's love of all things Moroccan inspires a distinctly Arabian theme with terracotta tiles, intricate patterns, brass lanterns and flashes of cobalt blue. Designer Michael clearly knows his stuff.

Outside landscaper Dawson designs an elegant organic garden and restful koi carp pond. Keenan gets what every 16-year old dreams of - his own indoor basketball court. When the schedule falls alarmingly behind who better to help out than the Harlem Globetrotters? No ladders required...

Returning home, the family is so overcome with emotion that it's a struggle not to weep with them. And when Keenan shoots some hoops on his new basketball court with his Globetrotter heroes (and a surprisingly capable Michael) you'd think all his Christmases have come at once.