Kev, normally the defendant has to pay the Bailbondsman a certain fee for him to post a bond for the full amount of bail. From my own experiences it's usually 10% of the full bail amount but that could vary.
Bail is nothing more than a insurance that the defendant will apear in court. If they appear and the case is adjudicated the bail is then refunded or applied to the fines. If they fail to appear a warrant may be issued for their arrest. If they fail to appear on a bailbond they could have a warrant issued and have a bail bond agent ( which is a private citizen, not really LE) take them into custody and bring them to the PD for processing on the warrant. Basically the bailbondsman doesn't get the bond he posted back until the defendant goes to court.
I've seen that "Big Dawg" show. They are a little " out there" so to speak. Most of the bail agents I have dealt with are very professional IMO.
Hope I helped :wink: