In Forty Pounds of Trouble, she portrayed a character by the name of "Chris Lockwood". But, I don't know if that has any significance.

That's interesting, lets see where this goes

I added a discussion to the "Talk" page on Pleshette's Wikipedia entry, and a person suggestedwhile admitting having no proofthat her pen name could be "Walter Lockwood." The person mentions that the dates and a few other things seem to line up, and that there's no substantial bio info for Lockwood.
When I hear the name "Lockwood," my first thought is of Singin' in the Rain. This makes me lean toward thinking it's a pen name. Whether or not it's Pleshette's pen name, I can't say. Anyway, it's more of a lead than we had, so it's worth pursuing.

I've wondered too. I assume she starred in the films she wrote? Maybe if you searched every movie she did post Newhart and see if there's any duplication of writers??

I don't know, I have been searching and searching,and usually I can find what I am looking for (around my house I am known as the "internet guru" lol) but so far no luckI am not giving up,because I collect SP memorabilia.

Sweet! Somebody else! How the heck are we supposed to go about finding out?

I have wondered about that myself