I'm trying to locate this episode, which I saw on tv several years ago and was always fond of.
IIRC, the story was about a woman in prison who's desperate to get out. She encourages a black guy who works inside the prison to help her escape by putting her in a coffin, 'burying' her and then digging her out when the coffin is out of the prison.
All seems to work well until she's in the coffin, buried, lights a match to assess her situation, and realises the black guy is dead and in the coffin with her.
Sound familiar? Trying to nab this one if I can....love the irony...