From imdb.com:

"1949's "King of the Rocket Men" was the first of three serials from Republic Pictures featuring a man wearing essentially the same rocket suit and helmet. The other two, both released in 1952, were "Radar Men From the Moon" and "Zombies of the Stratosphere."

But the best part, is this comment, also on imdb:

"The third serial, "Zombies," while not remade, is probably the best remembered since it marked the science-fiction feature film acting debut of Leonard Nimoy (later, Mr. Spock of Star Trek fame) playing Narab, a Martian zombie."

This I remember seeing sometime in the past few years. I think it was part
of a retrospective of Nimoy and/or Star Trek actors.