I always thought that Keith Coogan was somehow related to Billy Mumy since they look so much alike (to me). I just did some digging and see that I was mistaken.
Bill Mumy,
though has been much busier than I imagined since his Little Googie (Munsters) and Lost in Space days, check his resume at IMDB.
Also, interesting to note, Bill's daughter,
Liliana Mumy
has been busy herself establishing a Hollywood resume. You've likely seen her in both Cheaper by the Dozen installments of late as well as in Santa Clause 2 with Tim Allen.
Bill Mumy,
though has been much busier than I imagined since his Little Googie (Munsters) and Lost in Space days, check his resume at IMDB.
Also, interesting to note, Bill's daughter,
Liliana Mumy
has been busy herself establishing a Hollywood resume. You've likely seen her in both Cheaper by the Dozen installments of late as well as in Santa Clause 2 with Tim Allen.