Red. 7th if watched chronologically.
The color red is highlighted in this episode-many of the characters were red clothing & it is scattered throughout the backgrounds of several locations, the getaway boat,
The name of the boat aboard 4 members running away, "The Hickory Wood" is named after "Hickory Wood Farm" of DIx Handley's (Sterling Heyden) homeland from a caper movie classic " The Asphalt Jungle".