This is a really bad crossover. Having two different networks and creators and writers working on two successful shows does not mean it will be a successful crossover.
Chicago Fire, Chicago Med and Chicago Med, plus NCIS and their spin offs all work together in successful crossovers due to the same creators, writers and locations.
But in this case of Magnum and Murder She Wrote fails big time as you have different creators, plus CBS, Universal and Belisarius Productions, Inc. And Glen A. Larson Productions all working together it does not work.
Although both shows are fine as standalone creations, it just does not work out as a crossover, you will be extremely bored with this attempt at crossover.
Chicago Fire, Chicago Med and Chicago Med, plus NCIS and their spin offs all work together in successful crossovers due to the same creators, writers and locations.
But in this case of Magnum and Murder She Wrote fails big time as you have different creators, plus CBS, Universal and Belisarius Productions, Inc. And Glen A. Larson Productions all working together it does not work.
Although both shows are fine as standalone creations, it just does not work out as a crossover, you will be extremely bored with this attempt at crossover.