In 1964, Summers joined the cast of GENERAL HOSPITAL as Dr. Bob Ayres.
He then was the second male lead on CBS' co-starred in jungle adventure series DAKTARI, which followed the activities of veterinarian Marsh Tracy, played by Marshall Thompson, in a remote area of Africa. The series ran from 1966-68.
In 1972 Summers starred as Rodney Harrington on RETURN TO PEYTON PLACE, a role he would play for two years.
The actor also guested on a variety of shows ranging from MY FAVORITE MARTIAN and THE OUTER LIMITS to MY THREE SONS and FANTASY ISLAND.