LOS ANGELES (AP) - Robert Stack, whose granite-eyed stare and menacing baritone spelled trouble for fictional criminals in TV’s “The Untouchables” and real ones in “Unsolved Mysteries,” died at his home. He was 84. Stack’s wife Rosemarie found him slumped over in the couple’s Los Angeles home about 5 p.m. Wednesday. The actor underwent radiation treatment for prostate cancer in October, but his wife said he died of heart failure. “He was feeling so good,” she said Thursday. “He had a bout with a tumor but that was gone. It wasn’t that, it was his heart. He was too weak. He wouldn’t have lived through a bypass.”
One of the good ones. He was also an Olympic athlete, having participated in one of the shooting events.
Aw, rats.
Wow, I didn’t know he was 84!
Stack had a great voice. Although I can’t recall any right now, he voiced some great cartoon characters every once and a while.
He was also quite a hottie in his day. I had a bit of a crush on him during his Elliott Ness days . . .
Sure, like the FBI agent in Beavis and Butt-head Do Ameria. 
R.I.P., Mr. Stack.
Robert Stack was responsible for the only thing in “Airplane!” my dad found funny. There’s a scene where he whips off a pair of shades to reveal another pair of shades underneath. My dad burst out, from a stone dead silence throughout the rest of the film, with a full throated laugh.
I can think of no higher tribute.
He also had a fairly good role in Transformers: The Movie. IIRC, he was the voice of Ultra Magnus. He definitely had a very distinctive voice.
If you read that with Stack’s voice in mind, it could be the intro to a kick-ass Unsolved Mysteries piece.
Loved that show.
Whenever people found out I spent time working for UM as a consultant, the first question was always “Did you get to meet Robert Stack?” I always joked that they kept him in an airtight storage container that they rolled in front of backdrops for his monologues (how else would you explain his amazing appearance for an 80-year-old man??), and us peons were never allowed to come in contact with him.
RIP.
I could have sworn that I recently saw a commercial about a return of “Unsolved Mysteries.” Anyone know if they just finished filming a season, or maybe they were in the middle of one?
Remember him as the heroic young pilot in To Be or Not To Be (1942), Carole Lombard’s last film? He was one adorable little fly-boy in* that*.
Unsolved Mysteries did just finish shooting a new season; sadly, it may well be its last. Boy, will I ever miss that show.
I do! I saw this movie for the first time recently, and was surprised when I recognized just who that pretty boy was.
I’m sorry to hear he’s gone.
Another photo of him when he was really cute.
So Long, Ultra Magnus.
I just saw Written on the Wind again recently – Stack is amazing in that movie, which is one of my favorites. He will be missed.
Yeah, that was my first thought as well.
Actually, it was more like “Ultra Magnus! NOOOOOOOOOOOOOO!”, but hey…
“First Prime, now Ultra Magnus. What do we do?”
–Arcee, Transformers: The Movie
Whoa-I had no idea he was 84!
In The Untouchables Elliot Ness smiling was a very rare sight; smiling is going to be rare for me today too. RIP Robert.