Businessman (uncredited)
Widowed mother Mildred must suddenly redefine herself and find an outlet for her nurturing side when her adult daughter moves out of the family home. Though Mildred thinks she's found her purpose when her neighbor, overworked single mother Monica, asks her to look after her little boy, she has great difficulty learning to strike a healthy balance between giving selflessly to others and remembering to take care of herself.
Student (uncredited)
Matthew Bennell notices that several of his friends are complaining that their close relatives are in some way different. When questioned later they themselves seem changed, as they deny everything or make lame excuses. As the invaders increase in number they become more open and Bennell, who has by now witnessed an attempted 'replacement', realises that he and his friends must escape or suffer the same fate.