Finally the first real indication in any Doctor Who that a companion's disappearance can have an impact on people's lives, their friends and families. Camille Coduri was genius casting as Rose's mum, her upset at Rose's unexplained year long absence is great, she was such an endearing character. Mickey is also much better in this one, he's seemingly been under suspicion for murdering Rose due to her absence. There are some real goodies in this one, the Bad Wolf theme is now ringing alarm bells as it's quite prevalent. We hear the Doctor call Micky 'Ricky,' Jackie's sideboard looks like it's full of tonics of some sort, both themes are picked up later on. We get the first new series appearance of UNIT and a first appearance of Toshiko. We get the usual BBC NEWS 24 updates (what happened to those, I used to love a news update.) Aliens of London is big and fun, from the Spaceships falling through London destroying Big Ben, the Slitheen themselves and the glorious performance of Penelope Wilton as Harriet Jones. It is hard not to watch this without a smile on your face, it's not iconic but it's fun. I understand the farting cabinet will irritate some of the die hard fans, but humour can be great when it's combined with a dark element, had this been a darker more sinister episode it would have worked a lot better, as it stood, it was a bit too light. Finally we get a Doctor Who cliffhanger and it's a good one, with multiple characters in danger, the Next week clip gave too much away though.