Puzzle 19

Those higher than barons but lower than earls.

Introverted, unsocial, shy.

Secret encounter with alien kidnappers.

Californian heathland.

The scientist who developed the polio vaccine.

Fragrant oil used in joss sticks, beauty products.

Civil rights activist who started a bus boycott.

Taiwanese beverage with black tapioca balls.

Unexplained evaporating blobs found in forests.

Gerard the French actor in Green Card.