Some Answers

1) Robert Culp portrayed Texas Ranger Hobias (Hoby: Hoe-bee) Gilman in the TV series: Trackdown (1957-1959). So, yes, Cosby is referring to his previous character.

5) Tonia (Leslie Uggams) has sympathies to the Communist Party and becomes
involved with Scott. In the scene you reference: Kelly is accused of Tonia's murder and Scott pretends to believe Kelly is guilty. Kelly escapes, is found by Scott who assures him he knows he is not guilty and offers him a gun with the retort: meet you at the pass.

6) Mexico because it ain't that far to go. Just south of the border and less
expensive than overseas travel and filming.

Happy to have you as part of the Forum.