A few things of note:

The Doctor wears a Stetson now. Stetsons are cool.

1. The Doctor is in a stetson again. It’s not fez but it will work.

2. “Anyone who isn’t an American drop your gun now!”

3.  I got a “Cowboys and Aliens” vibe from bits of this.  I trust Moffat to do the concept justice. Sorry Jon Favreau.

4. Was anyone else expecting Cpt. Mal Reynolds and Serenity to appear in the horizon?  I’d love to see the Doctor and Mal square off.