Trial Run is a 1984 New Zealand film directed by Melanie Read starring Annie Whittle.

Plot

Rosemary Edmonds, a photographer and runner, must temporarily leave her husband and two children when she moves into a remote coastal cottage to carry out an assignment to photograph a colony of rare penguins. It soon becomes apparent that she is being stalked in the cottage by an unknown tormentor. In a twist ending, the "stalker" is revealed to be Rosemary's own teenage son.