This is Christopher Bishop's third talk on Graphical Models, given at the Machine Learning Summer School 2013, held at the Max Planck Institute for Intelligent Systems, in Tübingen, Germany, from 26 August to 6 September 2013.
Slides for this talk, in pdf format, as well as an overview and links to other talks held during the Summer School, can be found at http://mlss.tuebingen.mpg.de.