Even though they aren't the only place to look, TV movies (especially ones that coincided with Columbo as far as the years, or came close) are a good place to look.
One I can name is THE BROTHERHOOD OF THE BELL from 1970.
Rosemary Forsythe
Dean Jagger
Maurice Evans
Will Geer
Dabney Coleman
James McEachin
I haven't seen it in some time, but ESCAPE FROM THE PLANET OF THE APES has Roddy McDowall, Kim Hunter, Bradford Dillman, Sal Mineo, William Windom and Ricardo Montalban.