How do I enable in-stream ads on Facebook? By Jack Neff. December 31, You can see the screen shot, to ring a bell for those that have seen the commercials. Car Shield advertises great warranty coverage but does not live up to the advertisements. Home Advertising Magazine Who is the girl in the new Eharmony commercial? Who plays the struggling actor on the Liberty Mutual commercial? Doug, in the Liberty Mutual commercials, is played by actor and comedian David Hoffman.