E.J. Gold's Galaxy Ezine: Science Fiction, Fantasy . . .
The phone rang one day -- it was Harlan Ellison inviting me to come down to Arena Productions to meet Sam Rolfe and to view, with other screenwriters, the black and white pilot for the series. Arena was in the MGM lot, and Harlan came out of a swarm of writers to greet me.
A chance walk-on by David McCallum as a Russian operative caught fire, and he and Robert Vaughn were immediately paired as a spy team somewhat imitative of I Spy... I saw someone else in the part of Waverly, can't recall who it was, but he was replaced by Leo G. Carroll at the insistence of Network -- Carroll was better known by the tv audience.