i like the first one . the second one be pretty much just an excuse to show a many boob a possible . the third one definitely exceed both the second film and my expectation . honestly they should have leave the story where it be at the end of specie three . this movie have almost nothing to do with the first three . none of the same character and it doesn not explain how the scientist get there hand on the alien dna . the idea not bad and but after the first chase scene in the street of mexico the movie shift to a series of dimly lit night sequence which make it hard to even understand what go on . and let be honest here represent a large focal point or selling factor for this series be the sexuality that go along with these reproduce alien . the nude scene be pretty pointless in this film . there be enough show to attempt some arousal but the lighting be so bad that it hard to make out what even happen . if they want an excuse for nudity they should have light the stage well . if they want to just convey the sexual point in the story they shouldn not have film full body sex . basically if you be happy with how they end number 3 and do not waste your emotion get involve with these unrelated character . if you just want to see boob and pick a different movie . either way steer clear because you will be disappoint no later than halfway through the film .