You had, I think it was Outer Limits too. A surgically altered human is sent to infiltrate aliens, gain their trust and spy on them, only to truly become one of them.
Then there is this that I read decades ago:
en.wikipedia.org
View attachment 7527
" The plot involves an attempt to explore the surface of the planet Jupiter using remote-controlled artificial life-forms. It focuses on the feelings of a disabled man who operates an artificial body. "
The critter on the cover is, like Sully in Avatar, in a wheel chair and can transfer his mind into an artificially constructed being that can handle the greater gravity of Jupiter... and kick the butts of anything that attacks him down there.
A meme: It's a tree. We have missiles. What kind of intelligence do you need?
View attachment 7528