Becky's folks pressure her to stop dating a boy.

Sixty-five years after attempts to ban them, chemical weapons pose more of a threat than ever. NOVA looks at the problem of controlling substances that are easily produced and cruelly effective.

When a millionaire is gunned down in a parking garage and his wife ends up in the hospital, Greevey and Logan initially suspect a crackhead who had been doing drugs in the stairwell, but after realising that the crime doesn't fit the pattern of a robbery, Greevey and Logan have a hunch that a different motive may be involved. The widow's story seems a little too rehearsed, leading detectives start to uncover a bizarre romantic relationship between the widow and the couple's former business manager.