This is the very last Black and White Episode of the series in air date order, although it is possibly not the last episode that was filmed (See Episode # 172). ABC had refused to finance the switch to Color filming and in fact had cancelled the show whilst wondering if MacMurray would sign on for another year as the family patriarch. Fred's mother Maleta had also passed away in mid 1965 which may have accounted for his hesitance, but Executive Producer Don Fedderson then sold the series to CBS for a figure reported to be somewhere between five and seven million dollars. CBS took a gamble that paid off for them handsomely; they promised to start filming and broadcasting the show from September, 1965 in Color. The added expense of Color film meant that naturally the sets had to be spruced up for this dramatic change of production technique. From the next season the sets appear to have subtle changes that the show's Art Director and Set Decorators all had a hand in. Notice the Douglas telephones, they all seem to be more modern and a brighter, lighter color. Additionally Steve's main chair in the loungeroom has undergone a complete transformation in color from black to red leather. The added attraction of seeing a previously monochrome favourite in living color no doubt brought the show new fans. Color television was exploding all over the dial and in 1965 very few shows were still being filmed in black and white at that time. Those that were (eg. the Screen Gems series "Bewitched" and "I Dream of Jeannie") would make the transition to color filming the following year. Intriguingly enough, both of those classic series, produced by Columbia Pictures televison subsidiary Screen Gems had their black and white catalogues colorized by Dynacs Digital Studios in 2000. In the age of DVD authoring, not only does it make these much-loved series worth preserving, but the colorization has come such along way from the Ted Turner efforts in the 1980s. If only we could get them interested in doing "My Three Sons"! If anything having them altered to color would make them appeal to TV stations who insist on color programming.