I need help identifying a sci-fi animated series I remember watching at some point in the later '90s. I remember watching it on TV sometime around 1996-1998.
In the episode I saw a UFO/alien craft of some kind crashed somewhere on Earth. The alien aboard was some kind of large black spider-like robot.
At least one of the protagonists was a scientist (I believe working with the government). I think his title was either Dr. or Professor.
The government(?) recovered the craft, and held it in a kind of Area 51-like base in a hangar. Then at some point the spider-robot-alien escaped in the UFO.
They had to shoot down the UFO using some kind of special ray gun/machine gun turret. It was a massive gun turret that they had to wheel out. I remember the scientist (Dr. or Professor) operated the gun by sitting behind/beside the turret.
It was very urgent they shoot down the UFO before it escaped (I think), and at the end of the episode they were able to bring it down.
The main things I remember are the spider-like robot in the UFO, and the scientist using the advanced space gun turret at the end to shoot down the UFO.
Any help would be much appreciated! Thanks!