Summary Box: James Murdoch back to UK Parliament

COMING THURSDAY: James Murdoch, a senior News Corp. executive, is expected back in Britain for a second grilling in Parliament over the phone hacking scandal that has shaken his father’s media empire.

THE BACKDROP: Murdoch has long insisted that he knew nothing of the culture of criminality whose exposure has been called “Britain’s Watergate.” However, mounting evidence suggests otherwise, as key former executives contradict him and the company’s former lawyers challenge him.

HIGH STAKES: Investors have become increasingly restive as the scandal continues to spread. Murdoch’s position as heir apparent to his father’s company is under threat.