What set(s) do these pieces belong to? The orange wheels are very similar to the red buggy from the Neptune carrier.
Most of this looks like it's part of the Mars Mission range - however, none of those sets contain the 2 flames, and the Minifig has both wrong colour torso (grey, instead of white), and the wrong type of helmet (he has Headgear Helmet Space instead of a Motorcyle Helment)
As for which Mars Mission set you have there, from curved Windscreen, the Technic bars that the wheels are attached, the device the Alien is strapped into, and the arm on the drill, I believe that this is ETX Alien Strike

You can see the Alien in the holding contraption at the back of the mini rover, the wheels beneath it, the drill-arm in the centre, and the cockpit &amp; windshield at the front.  It looks like you might actually have most of the rover in your photo!