The painting of Alice Reed was done by Paul Clemens. He painted portraits of many Hollywood stars, often with their children. He was married to Eleanor Parker from 1954 to 1965.

Edward G. Robinson, Dan Duryea, and Joan Bennett would go on to play the three leads in Fritz Lang's next film Scarlet Street (1945).

"Lux Radio Theater" broadcast a 60-minute radio adaptation of the movie on June 25, 1945 with Joan Bennett, Dan Duryea, and Edward G. Robinson reprising their film roles.

Was based loosely on J.H. Wallis's 1942 novel, "Once Off Guard".

The last film role for George 'Spanky' McFarland for 42 years until The Aurora Encounter (1986), which would be his final one.

The ten cent road toll equals about $1.50 in 2020, and the $3.25 prescription equates to ~$47.

Former "Our Gang" members George 'Spanky' McFarland and Robert Blake (Mickey Gubitosi) both have cameo appearances. They did not have any scenes together. Spanky, (who is 16) plays a bespectacled Boy Scout on a newsreel who discovers Manzard's corpse, while Blake appears early on in the picture as Professor Wanley's little boy, Dickie, departing the train station with his mother and sister, Elsie.

Raymond Massey was borrowed from Warner Bros. for this film.

Wanley's car is a 1937 Cadillac Series 65 Touring sedan. MSRP new was $2,190 ($31,900 in 2020). Only 7,003 of this model were made.

According to contemporary articles in The Hollywood Reporter, this film was shot on several sound stages at Goldwyn, Paramount, RKO, PRC and Selznick studios.

Was released on DVD by MGM on July 10, 2007.

Included among the American Film Institute's 2001 list of 400 movies nominated for the top 100 Most Heart-Pounding American Movies.

For the transition at the end out of the dream, Edward G. Robinson wore a tear-away suit over the original suit he wore in the beginning of the film, and while the camera was focused on his face that suit was removed and all of the set around him was changed in one unbroken shot.

Fritz Lang claimed that the ending, which all turns out to be a dream, was his idea, because he felt the idea of Wanley committing suicide was too anticlimactic.

Dist. Atty. Frank Lalor explaining to Professor Richard Wanley and Dr. Michael Barkstane how two murderers are fearing about each other, each wondering how long it'll be before the other is caught and blabs out the whole story is an example of the "Prisoner's Dilemma," which is widely analyzed in game theory.

Edward G. Robinson's choice of reading material on the night of his encounter, The Song of Songs, is a clear harbinger of things to come, in that it celebrates romantic love.

Aside from three of the lead actors from this film starring in Scarlet Street (1945), the latter film has several linking themes with The Woman in the Window (1944). A prime example is how Edward G. Robinson plays the same kind of character in both films, driven to murdering someone in both films.

Although plausible in Wanley perhaps knowing all in his dream, he never personally meets Heidt in his dream, but shows recognition to Tim, the coat check guy, as being the doppelganger of Heidt.