Andrew Koenig's Parents Leave Before Going Live With Larry King

Walter Koenig and Judy Levin-Koenig scheduled to be guests on CNN show but abruptly leave the studio without explanation right before cameras set to roll

Another mystery involving the Koenig family.

The parents of missing actor Andrew Koenig—who was last seen in Vancouver on Valentine's Day—were scheduled guests on Larry King Live tonight, but they abruptly left the studio right before the cameras were set to roll.

"For some reason unbeknownst to anyone, Walter Koenig, the father of the missing Andrew Koenig, and [Andrew's mother] Judy Levin-Koenig...left the studio in Vancouver," King said on the air.

"We checked them out, they were prepared to go on, I said 'hello,' they said 'hello.' We said we'd be on in two minutes, they said 'fine.' And they got up and left for reasons unknown."

We can only hope they hadn't just received bad news.

Koenig's sister, Danielle, appeared on Larry King Live last night to discuss her brother's disappearance.

"It's just very upsetting," she said. "My brother does suffer from depression, so we're very, very worried about him, and we just want to find him."

Walter Koenig, who played Chekhov on the original Star Trek, and his wife appeared on the Today show this morning and then issued a statement directly appealing to their missing son.

"I just want to know you're OK," Walter said. "If it means you just want to stay here, that's OK. You don't have to come back. Just let us know that's your intention."