Probably more incentive (much like Star Trek's "Prime Directive") to *not* interfere -- esp. tech-wise. But more, just to study, to remember, to vicariously live/re-live through...
((For those who don't recognize it, STARMAN put Jeff Bridges as a alien who'd taken the bodily form of Karen Bridges' [deceased] honey. Big ol' chase ensues, but the alien is getting weaker. He (and Karen Bridges) appears cornered and it looks like the jig is up......))