Special guest star

[captpackrat]

It's weird when you watch a TV program and see someone who would later star in another related series.  So far on Adam-12 I've seen Randolph Mantooth, Bobby Troup, Ron Pinkard, Tim Donnelly, Marco Lopez and Art Balinger, all of whom would later star in another Mark VII series, Emergency!, as Paramedic John Gage, Dr. Joe Early, Dr. Mike Morton, Fireman Chet Kelly, Fireman Marco Lopez and Battalion Chief Conrad, respectively. 

(Yes, there was an crossover episode with Adam-12 and Emergency!, but these particular episodes were aired long before Emergency! and the actors play other characters.)