It's included in the "Alfred Hitchcock Presents: Season 4" box
set.
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Alfred Hitchcock Presents - 1955 Specialty of the House 5-12 was
released on:
USA: 13 December 1959
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Inger Stevens appeared as Laura Ross in the episode 'My Brother,
Richard' of Alfred Hitchcock Presents in 1957. She also appeared on
an episode of The Alfred Hitchcock Hour in 1963.
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"Alfred Hitchcock Presents" became "The Alfred Hitchcock Hour"
for the last 3 seasons--"An Unlocked Window" was on the very last
season of the series and was a memorable episode for many.