The witness protection programme just got hard boiled.

After finally waking herself up, a mobsters wife decides to testify against him and his organisation. As the trial draws closer she is constantly under threat of being murdered before she can spill the beans. Tough detective Walter Brown and his partner Gus Forbes are assigned to escort her safely across country via a train from Chicago to Los Angeles, but nobody can be trusted, and the threat of death is around everyone on board this speeding train.

Yes it may well be a "B" movie, but as "B" movies go this has to rank as one of the... read the rest.