 The pilot episode featured an opening different than the one used in the  regular series episodes: Inspector Gadgets siren entered from the left of  the screen instead of the right and the buildings had a different look,  Gadget had a mustache, different sounds were used in various places, scenes  from the pilot were intercut with traditional scenes from the opening, and  the title letters fell on a green screen rather than the traditional yellow.  Completely different end credits were used too: Inspector Gadget performing  various heroic and bumbling acts.