Helen Cale is 24 years old, blonde with freckles, and the first cousin of Simon Cale. She meets Jack in Florida at the Cale family reunion where he was standing in for Simon Cale. She follows Jack home when she overhears of her uncles plot to assassinate him, or Simon. Trixie mistakes her for the assassin when she meets her at the hospital after the real Simon Cale was shot. At the end of the episode Helen Cale decides to stay a few days presumably to be with Jack. Voiced by Lesley Livingston.
Appears in The Trouble with Doubles.