"Why should the Falls drag me down here at 5 o'clock in the morning? To show me how big they are and how small I am? To remind me they can get along without any help? All right, so they've proved it. But why not? They've had ten thousand years to get independent. What's so wonderful about that? I suppose I could too, only it might take a little more time."

"Too bad, they can't play it for you now, Rose."

"I met her in a beer hall. She was the most popular waitress they ever had."

"Don Wilson - Mr. Kettering"

"Marilyn Monroe and "Niagara" a raging torrent of emotion that even nature can't control!"

"Lurene Tuttle - Mrs. Kettering"

"Russell Collins - Mr. Qua"

"Arthur Loft - Claude Mazard/Frank Howard/Charlie the Hat check Man"

"Thomas E. Jackson - Inspector Jackson, Homicide Bureau"

"Dorothy Peterson - Mrs. Wanley"

"Edward G. Robinson - Professor Richard Wanley"

"Joan Bennett - Alice Reed"

"Raymond Massey - Dist. Atty. Frank Lalor"

"The screen's supreme adventure in suspense!"

"Dr. Michael Barkstane: We've decided she's our dream girl just from that picture."

"Heidt: I don't want to make trouble for anybody. I can, of course, but I don't want to."

"Edmund Breon - Dr. Michael Barkstane"

"It was the look in her eyes that made him think of murder."

"There are only three ways to deal with a blackmailer. You can pay him and pay him and pay him until you're penniless. Or you can call the police yourself and let your secret be known to the world. Or you can kill him."

"[Sees Alice Reed for the first time, after just seeing her painting in the window] I-I couldn't have drunk that much."

"In the District Attorney's office we see what happens to middle-aged men who try acting like colts."

"The streets were dark with something more than night."

"Dan Duryea - Heidt/Tim, the Doorman"

"[lecturing] The Biblical injunction "Thou shalt not kill" is one that requires qualification in view of our broader knowledge of impulses behind homicide. The various legal categories such as first and second degree murder, the various degrees of homicide, manslaughter, are civilized recognitions of impulses of various degrees of culpability. The man who kills in self defense, for instance, must not be judged by the same standards applied to the man who kills for gain."

"We rarely arrest people just for knowing where the body was."

"Douglas Kennedy - Detective in Diner"

"Rory Mallinson - George Fellsinger"

"Houseley Stevenson - Dr. Coley"

"Clifton Young - Baker"

"Lauren Bacall - Irene Jansen"

"Bruce Bennett - Bob"

"In danger as violent as their love!"

"Agnes Moorehead - Madge Rapf"

"You know, it's wonderful when guys like you lose out. Makes guys like me think maybe we got a chance in this world."

"[to Vincent] I've cried myself to sleep at night because of you. She's got you now. She wants you very badly doesn't she? She's willing to run away with you and keep on running and ruin everything for herself. But she wouldn't care because she'd be with you and that's what she wants. Well she doesn't have you now. She'll never have you. Nobody will ever have you! And that's the way I want it! You're nothing but an escaped convict. Nobody knows what you wrote down. They'll believe me! They'll believe me!"

"Two Of A Kind ! Tough . . . Torrid . . . Terrific !"

"Humphrey Bogart - Vincent Parry"

"Together again"

"Alec Craig - Turnkey"

"Morgan Wallace - Fred Garrett"