The Lost Aztec Temple of Mars has stood atop the hills of Sherman Oaks for decades, with a façade lovingly fashioned like the ruins of an ancient alien civilization. Carved into its faded orange exterior is an imagined history of flying ships and extraterrestrials, of tangled tendrils and tentacles, of creatures serpentlike and humanoid. This was the home of author Harlan Ellison, a sanctuary he also called Ellison Wonderland, where he wrote his popular scripts and short stories and kept its rooms filled with a museum-grade collection of science fiction and pop culture.

The house is largely as he left it in 2018, when he died there at age 84. For much of his life, Ellison was a leading writer of science fiction (he preferred the less restrictive label “speculative fiction”), a close friend to colleagues including Isaac Asimov and Neil Gaiman, but also notorious among his many enemies and comrades in Hollywood and the once-insular science fiction world.

Upstairs at the house, where Ellison’s manual typewriters, tobacco pipes and a row of rocket-shaped Hugo Awards remain, it is familiar and sacred ground to his old friend, the writer and producer J. Michael Straczynski.

“His personality’s in that house. You can feel him in every inch of the place,” says Straczynski, creator of the popular ’90s sci-fi TV series Babylon 5 and the author of multiple books and screenplays. He is the executor of Ellison’s estate, and he often spends time at the house alone, immersed in the dazzling milieu his late mentor created in life.

For Straczynski, 69, Ellison was not just a friend but a father figure of lasting impact. His real father, he says, “was complete shit.” Another executor would have simply liquidated Ellison’s assets, donated them to a favorite charity and moved on. But Straczynski has taken on a bigger mission — to return Ellison’s name to prominence.