Walter Koenig goes on Today to appeal for his missing son

Walter Koenig, the actor who played Chekov on the original Star Trek, has stepped up efforts to find his missing son, Andrew, going on NBC's Today show; watch his appeal below.

"It's very, very tough," Walter Koenig tells Today. "He was very depressed about his life."

Andrew was supposed to be on a flight back to the United States from Vancouver, Canada, on Feb. 16, but didn't make it. The family is asking that anyone with information contact Detective Raymond Payette of the Vancouver Police Department at 604-717-2534.

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