I recall seeing this episode as a kid and watching the series weekly. I recently got my hands on some episodes and watched it from the start. I am convinced the same Nielson ratings that got Star Trek canceled got this show canceled--and unjustly so. In brief, Horton plays a man who is wounded and left to die--but doesn't. He awakens without memory of his past or identity. Week to week he seeks clues as to who he is. Horton wrote and sang the lyrics to the theme song using the traditional "Shenandoah" tune. Horton was multi-talented and a fine singer and actor.
It was a mysterious show with good acting by Horton and the many notable guest stars. The 30 minute time slot made for good action and efficient plot development. In "The Onslaught" we are quickly dragged into Horton's drama and dilemma, and go from week to week thereafter sharing his curiosity and frustration while he looks for his name and identity. The only regret I have regarding this show is that it was canceled without a wrap-up. A couple of more seasons and a finale would have been great.
Indeed, someone like Bruce Boxleitner could do a wonderful movie now using the original show as flashback footage. Boxleitner looks like someone Horton could have aged into. In a world of endless remakes, a stand alone movie providing a finale for this character's struggle would be nice.