Louie Rollins Louie Rollins was a young boy who was the cousin of Millie Peterson . He aided the Eleventh Doctor on several occasions . Biography . Louie was born a few minutes apart from his cousin Millie Peterson . His father ' s name was Geoff , and he had a baby sister named Ella . ( PROSE : " The Night After Hallowe ' en " ) Louie had been to a fun Halloween party with Millie , which they were discussing as they left school the next day . On his way home , the tyre of Louie ' s bicycle received a puncture and he was forced to stop in the middle of a street lined with warehouse s . He entered one of the warehouses , looking for someone to help him , but instead the warehouse was filled with Halloween decorations . He then saw a decaying man and met the Doctor , who took him a safe distance away . The toy spider s in the warehouse were then animated by the alien , and an animated skull and red eyes that fed off of Louie ' s fear appeared . Louie calmed his heart rate and deflected a burst of fire from the red eyes , which then caused the warehouse to explode . The Doctor returned Louie home , and the two and Millie went to Bonfire Night , where effigies of Guy Fawkes were animated . The Doctor took the cousins in the TARDIS to the warehouse , though they refused to stay in the TARDIS when the Doctor said it could get dangerous . Louie destroyed the alien with a device the Doctor had taken from the TARDIS . ( PROSE : " The Night After Hallowe ' en " ) At Christmas , Louie , Millie , and his aunt Rachael invited the Doctor to see a pantomime of " Peter Pan " , but no one had showed up due to the weather except Big Jack , who worked there . The power in the theatre was drained by a Brakari , who needed the energy for her and her baby to survive . Louie became very weak and later unconscious due to the decreasing temperature , though the Doctor and Millie later revitalised him and the Brakari . He joined the Doctor , Millie , Aunt Rachael , and Big Jack in the TARDIS to release the Brakari in space . ( PROSE : " Snowfall " ) The next year , Louie went to visit Millie during a snow storm and wide - spread blackout caused by the Council of Dead . He borrowed his neighbour snowboard , but accidentally hit a snowman ( which had been set up a sentry by the Council ) and crashed into Millie ' s kitchen . While there , they were visited by the Eleventh Doctor , who had been pulled off - course by the Council . When the Doctor identified the phosidium in the snow , Louie , the Doctor and Rachael went to the TARDIS to scan for more . At this point , Millie was kidnapped by an animated snowman and a downed cable was animated to attack them . The Doctor was able to destroy the cable and they went to the TARDIS to find both Millie and the phosidium . Realising that she had been teleported to a factory the other side of town and that she was likely chosen because of her connection to the Doctor , they decided to reach her on hoverboard s instead of with the TARDIS . Along the way , Louie and Rachael were attacked by snowmen and also teleported to the factory as well . As Millie had escaped at this point , Fasheith planned to use Louie and Rachael as bait to attract the Doctor . Louie was rescued after Millie returned with the TARDIS and a device to destroy the Council . After these adventures the Doctor took Millie and Louie to see the birth of the Salcreyan Nebula . ( PROSE : " Attack of the Snowmen " ) Appearance . Louie was thin and taller than Millie with straight blond hair . ( PROSE : " The Night After Hallowe ' en " )