Lily C.A.T.

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Take one part Alien and one part Invasion of the Body Snatchers and you would have Lily C.A.T..

Honest, some of the dialog, scenes and plot lines are direct takeoffs of the original Alien movie.

Nonetheless... It is the year 2264 and the spaceship Saldes has been sent to investigate a newly discovered planet. The trip will take 20 years and the crew asleep for the entire time and woken up at the end.

However, something gets aboard and before you know it, It starts absorbing the ship and the persons on it.

Lily C.A.T. is OK, especially if you liked the Alien movies.