world the first look at what could be a potential suspect. we have the latest from london. >> reporter: six years after maddie mccann went missing from a family vacation in portugal, detectives describe him as aged between 20 to 40 years old with short brown hair, medium build, medium height and clean shaven. >> he fits our clear and i'd ask the public to look carefully at them and if they know who this person is, please come forward. >> reporter: investigators have a list of 41 persons of interest after combing through phone records of tourists and residents near the portuguese resort at the time maddie went missing. >> we know 8:30 is the time that mr. and mrs. mccann went down for dinner and we know that around 10:00 p.m., that is when mrs. mccann found that madeleine was missing. >> reporter: that timeline will be the focus of a tv appeal on britain's version of "america's most wanted." it will feature a 25-minute reconstruction of what police believed to have happened here in this apartment the night that maddie vanished. >> reporter: the video re-creating that fateful day. her dad's tennis lesson with