Dr. Weird was Howard Keltner’s creation, appearing in the first issue top comic book
fanzine of the early 1960s,
Star-Studded Comics. Although, George R.R. Martin claims
he was unrelated to the contemporaneous Dr. Strange, both projected themselves into the
astral plane to fight occult menaces. Weird’s menaces, though, were certainly darker—and
he came from the future.
I don’t know whether any episodes after the origin included time
travel.