After the Thin Man was the 1936 sequel to the film 
The Thin Man.  It starred 
William Powell and 
Myrna Loy, as Nick and Nora Charles, and 
James Stewart.  This time the murder victim and suspects are members of Nora's high-society family; at the end, Nora tells Nick something he hasn't detected yet:  They're going to have a baby, who becomes the title of the third film in the six-movie series, 
Another Thin Man.
 
All Wikipedia text 
is available under the 
terms of the GNU Free Documentation License