Like a lot of people nowadays, I seem to hear all of my breaking news reports on Twitter, and that's how I found out that actor and activist Josh Andrew Koenig is missing. If the name doesn't ring a bell, he's the son of actor Walter Koenig ('Star Trek') and played Boner on the 80s sitcom 'Growing Pains.'

Koenig was last seen in Vancouver last week. He was supposed to fly back home on February 16 but did not board the flight and no one has heard from him since. Those familiar with the writing of Harlan Ellison know that the story "Jeffty is Five" was inspired by Koenig.

Koenig has been a political activist for quite some time and is also a camera operator on Never Not Funny. Several celebrities, including VH-1's Doug Benson, Jimmy Pardo (Koenig's brother-in-law), Sarah Silverman, Alyssa Milano, and 'How I Met Your Mother' star Alyson Hannigan have been tweeting about his disappearance and a Facebook page has been started. If you have any information about Koenig at all, please contact the Vancouver Police Department at 604-717-2534.

Update: Koenig's parents tell TMZ that he was suffering from depression and that the last time they heard from him was on February 9.