Movie: "Children of the Damned" with Ian Hendry

Have you ever seen the movie Children of the damned , the next chapter of the movie Village of the damned. The story is about six children who are very intelligent, scientists want to do research on them but the children don't want and leave their ambassies and go in an old church.
Ian Hendry plays in this movie as the doctor Lewellin, it's the "hero" of the story if we can say that !
The most strange scene is the scene where the children use their power : they kill people ! Suddenly their eyes change of color ! We don't know what is the color of their eyes because the movie is in black and white !