Erykah Badu as the guardian angel, Lady, and Frank Langella as the headmaster of Tommy's school.

WSJ: Duchovny Does Directing

The President also referenced the Guardian Angel program.

WHITEHOUSE: The White House

The mystic chords which proceeding from so many battle fields and so many patriot graves pass through all the hearts and all the hearths in this broad continent of ours will yet again harmonize in their ancient music when breathed upon by the guardian angel of the nation.

NEWYORKER: Union Man

Murderers, for instance, tend to have poorer functioning in the prefrontal cortex the "guardian angel" that keeps the brakes on impulsive, disinhibited behavior and volatile emotions.

WSJ: Neurocriminology: Inside the Criminal Mind

Normally, Tenovin affects cancer cells by increasing levels of the "guardian angel" protein p53 within cells, which plays a crucial role in controlling cell mutations.

BBC: University of Dundee uncovers new way to treat leukaemia

Santa Maria, Brazil (CNN) -- Pamella Vedovotto flips through a newspaper looking for the name of a man she calls her guardian angel.

CNN: Brazil club survivor remembers the man who saved her life

"He was my guardian angel, " she told the court.

BBC: Philpotts case a 'classic example of domestic violence'

He is what is known as a "guardian angel", protecting his comrades from the increasing threat of insider attacks.

BBC: Afghanistan: How will all the sacrifice be remembered?