Mary Portas explores why Barbie has maintained such an iconic status over almost 60 years. In California, Barbie manufacturer Mattel open the doors to their HQ, giving Mary privileged access behind the scenes to find out what makes Barbie tick. Mary also has a date with the real life Ken. In Houston, Texas, at the National Barbie Collectors’ Convention, Mary meets grown-ups who can’t seem to grow out of playing with Barbie. In the UK, Mary investigates whether Barbie really is to blame for low body image or lack of job aspiration in young girls. With calls for an ever increasing gender-neutral world, Mary asks her son Horatio whether boys really should play with ‘boys toys’ and girls with ‘girls toys’? And with Barbie sales have recently dipped, can the doll stay relevant going forward?