I just found this interview with Chuck Palahniuk where he reminisces about a youthful enthusiasm for Ellery Queen, both in the books (he slightly exaggerates their number) and the Jim Hutton-led TV series. It's interesting to see how they might have shaped his own identity as an author, particularly as both the Queen series and The Big Valley―with which I'm not really familiar―depicted single-parent families.
I just reread Double, Double. This is a good mystery but an oddity in the series of Ellery Queen books. A young woman hires him to investigate the death of her father, which seems a little off considering that he's a novelist and not really a PI. His father, Inspector Richard Queen, only makes a one-paragraph cameo despite his importance in the series overall. The new client also briefly works as Ellery's secretary, so Nikki Porter seems to have been forgotten for the time being. I sort of suspect that Danny and Lee roughed this out for another character and added Ellery later. The bare bones of his personality do appear, though.
Ten Days' Wonder, by contrast, could only be about Ellery Queen. It might be the most psychological book its authors ever wrote. The amateur sleuth's wit and background give him hints, but also cause him to have blind spots about the other characters, leading to tragedy. Claude Chabrol filmed this one, although for some reason he replaced Ellery Queen with an alternate fictional character.