India, April 25 -- Alfred Hitchcock's cameos were born of necessity - he sometimes simply needed more people in the frame. They became a superstition, then an annoyance. People spent so much time trying to spot him, that he began to make his appearance in the first five minutes, so everyone could concentrate on the movie again.

Can you tell which five films the following cameos are from?

1. Seated at a table in a class reunion photograph (above).

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2. As a shadow on the glass door of the Registrar of Births and Deaths office.

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3. On a train, playing cards; his hand is all spades, the best hand there is in bridge.

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4. As the before-and-after photos in a newspaper advertisement for a weight-loss drug named Reduco. He had recently ...