Adam Markovitz
February 25, 2010 AT 10:36 AM EST

The parents of missing actor Andrew Koenig walked out on Larry King just minutes before their scheduled segment last night. “Still not sure what happened with the Koenigs,” King tweeted yesterday evening. “I talked to them in the break and told them they were on next. Then they left…” The talk show host was set to interview the couple — actress Judy Levitt and actor Walter Koenig (who played Pavel Chekov on the original Star Trek TV series) — about the mysterious disappearance of their son, best known for his role as Boner on the 1980s sitcom Growing Pains. Koenig went missing over a week ago while visiting friends in Vancouver, B.C. Earlier this week, Walter Koenig told Today that his son had recently stopped taking medication to treat his depression.

More on Andrew Koenig:

‘Growing Pains’ actor Andrew Koenig reported missing

Walter Koenig on missing son Andrew: ‘It’s very tough’

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