Webb and longtime colleague James E. Moser created the show; Leonard B. Kaufman was the producer.

A county sheriff from Nebraska whose wife and child died in a fire, O'Hara cut all ties with his past life.

Guest stars in the series' brief run included Bruce Bennett, Godfrey Cambridge, Paul Comi, William Conrad, Yvonne Craig, Gary Crosby, James Doohan, Will Geer, Frank Gorshin, Alan Hale Jr., Martha Hyer, Marilyn Maxwell, Ricardo Montalbán, Judy Pace, Leslie Parrish, Larry Pennell, Brock Peters, Charles Knox Robinson, Marion Ross, Don Stroud, George Takei, Jessica Tandy, Angel Tompkins, Lindsay Wagner, Betty White, Joseph Wiseman, Lana Wood, and Dana Wynter.

[3] According to Brandon Tartikoff, when Fred Silverman was the head of programming at CBS and considering whether or not to renew O'Hara, he met with a representative of the Treasury Department, who told him, "There are those of us down in Washington who like the idea of a weekly prime-time showcase.

Silverman didn't take the Treasury representative seriously, but according to Tartikoff, after the show was cancelled, "about a dozen top CBS executives on both coasts had their income taxes audited the following year.