The pilot was a TV movie titled Probe (1972), which was intended to be carried over to the series. However Albert Burke took issue with the use of this title, as it was the same as his widely seen syndicated series Probe (1962). His objection carried weight with NBC as he had a long standing relationship with the network, filmed his shows at their New York studios, and had served as their Educational Broadcasting consultant. Consequently, not only did this series air as "Search," but the pilot was so re-titled for the summer network rerun and subsequent overseas syndication.

All three of the rotating star actors, Hugh O'Brian, Doug McClure and Anthony Franciosa, receive a credit in the opening titles. The one actor who appears in the episode receives a second credit just before the episode title appears.

Agents used implants to comm with Probe control

Probe control loosely based on NASA Mission Control Center.

The show correctly predicted tiny cameras, tracking and communication capabilities that mobile phones delivered decades later.