Detectives investigating the disappearance of York University chef Claudia Lawrence are expected to reveal a series of new lines of inquiry on TV's Crimewatch programme tonight.
Claudia's sister Ali Sims is also interviewed on the BBC programme and she talks of the family's agony of not knowing what has happened to her
A TV appeal for help finding missing York University chef Claudia Lawrence last night led to a number of viewers calling in to the studio.
Crimewatch said it received eight calls and North Yorkshire Police received one call direct to the force.
Police are investigating these further.