wherein some sort of turtle/reptiloid alien is somehow stranded on Earth, and can make electronic(or all sorts of things? (can't remember anymore)) work with his (on demand) red glowing finger. And tries to build a "telephone" out of trash with the help of a child, to "phone home" and call for help.

If we would fly there, we would need about 80 years with our current rocket tech. It's the nearest earth-like planet afterall. They could be more advanced and be here earlier. We'll see.