After his first appearance in a 10-page story in Mystery Comics Digest #5, Dr. Spektor was spun off into his own title, The Occult Files of Doctor Spektor. The series ran for 24 issues (May 1973 – February 1977). His final original story appeared in one issue of Gold Key Spotlight (#8, August 1977). Jesse Santos replaced Spiegle as artist on the series, and remained there for the entire run.
Dr. Spektor appeared in all four issues of Gold Key’s Spine-Tingling Tales (1975–76), where he provided linking narration for some of the stories within. (These stories were reprints from Mystery Comics Digest that dealt with characters who later appeared in his title). He also had stories he narrated in Mystery Comics Digest #10, #11, #12, and #21, and articles in Golden Comics Digest #25, #26, and #33.
Under the Whitman Comics name, issue #25 was released in May 1982. It reprinted issue #1, but with a line-art cover instead of the original painted cover.
In 2014, Dynamite Entertainment released a new version of “Doctor Spektor”, written by Mark Waid and drawn by Greg Pak, as part of the company’s revival of several Gold Key characters (which also included Magnus, Robot Fighter, Dr. Solar and Turok)