A science script consultant tells all in “My life as an advisor to  TV and film“…

In general, I’ve found that producers of comedy have less interest in adhering to the facts than those involved in dramas.

but…

Even on the dramas, however, a cherished scientific truth will sometimes have to be discarded in order to enable an essential story development, such as a normally three-week-long forensic DNA analysis that’s fictionally done in one hour for the sake of plot pacing. In truth, few will ever notice these gaffs. As one TV producer told me, the number of Ph.D. scientists watching his show accounts for no more than 0.00001% of the Nielsen rating audience.