Third of 14 "Boston Blackie" films released by Columbia starring Chester Morris between 1941 and 1949.
Towards the end of the film, the action takes place at the "Jane Drake Theatre," where "Jane Drake" is appearing a play called "Bedtime Story," written by "Lucius Drake". These characters, the play and the theatre are all left over from Bedtime Story (1941), also produced by Columbia Pictures a few months earlier, starring Loretta Young and Fredric March in the Drake roles.
The bus driver (to and from prison) is played by an uncredited Lloyd Bridges.
The following year, Columbia again cast Larry Parks as a wrongfully convicted man in "The Power of the Press," also directed by Lew Landers.
Since it takes place in late December, and features Christmas trees and other holiday decorations throughout, this film is aired on TCM every year as part of their "holiday themed" programming.