His first TV role was in the drama Ben Casey.
He was born in a small farming town in Delaware but was raised in California.
Eddie appeared in more episodes of Star Trek than George Takei (Sulu) and Walter Koenig (Chekov).
Eddie was both a stand-in for William Shatner and James Doohan on Star Trek. For Doohan, he filled in as a hand-double in the episodes "Wolf In The Fold" and "That Which Survives," for close-up shots, as Doohan had lost his right middle finger during the D-Day invasion he served in and was too self-conscious about showing his missing finger on camera.