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2012 In Memoriam

39 of 59

August 14: Ron Palillo, 63

Ron Palillo, the actor who played Arnold Horshack on the sitcom "Welcome Back, Kotter" passed away following a heart attack. —XFINITY Entertainment Staff (Photo by Rob Loud/Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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