Sigourney Weaver actually makes the basketball shot. Even though the ball is out of shot for a second, she made the shot with no assistance.

In the scene where Ripley discovers the room full of failed clones, she stumbles upon Ripley 7, a hideous, malformed but still living clone. The entire scene after she discovers her ill-fated 'sister' is ripped directly from, and is an homage to, one of the most famous deleted scenes from the original Alien. Ripley finds a long dead Brett and barely living Dallas cocooned in the bowels of the Nostromo, and Dallas asks her in a pathetic, painful voice to kill him. She obliges by using her flamethrower. The scene in Resurrection is almost 100% identical, everything from the design of the flamethrower to the emotional reaction and facial expressions she had in the cut Alien scene.

Purvis is one of the human hosts for an alien and it rips through his chest on the betty. On an episode of 'the x-files', the man who plays Purivs plays a scientist who is a human host of an alien which burst through his chest.

When Johnner, Christie and Call are watching the home shopping channel, one of the items on sale is a pearl handle, semi-automatic pistol, the very same one wielded by Vasquez in the previous installment 'Aliens'.

Both Winona Ryder and Ron Perlman nearly drowned during the filming of the underwater scene.