Drag this tool to the bookmarks bar:
rt2imdb is a browser bookmarklet that will search for the selected text on IMDB so you can quickly find that film on the IMDB. If you have no text selected it will get the first bit of the title before the first - or | character, suitable for finding the film from the radio times website page about a particular film.
Please note: Since 21 Jan 2012 this system opens the IMDB page in a new window. This may be pop up blocked so you should allow all pop ups for radiotimes.com