Original sentence: He directed Anton Diffring and the legendary Klaus Kinski in giallos later in the decade, and then pretty much retired from filmmaking in 1972, emerging from his retirement in 1981 (at age 72) to direct one last slasher film, Murder Obsession (aka Fear)
Edited sentence: He directed Anton Diffring and the legendary Klaus Kinski in giallos later in the decade, and then pretty much retired from filmmaking in 1972, inexplicably emerging from his retirement in 1981 (at age 72) to direct one last slasher film, Murder Obsession (aka Fear)