"Trust Doesn't Rust" might have been where we first met KARR, but the writers really got it right this time around. KARR is leaner, meaner and so much more cruel in this installment.
Whereas Peter Cullen's portrayal of the Knight Automated Roving Robot (KARR) painted a portrait of a well-intentioned machination gone awry at the hands of the unenlightened. Paul Frees' growl and the more comtemporary production of this third season episode really presents KARR as KITT's alter-ego; with KARR being equally as evil as KITT is good.
Jeffrey Osterhage performs credibly as the young, down-on-his-luck John Stanton; although frankly he looks nearly at home behind the wheel of KARR as Michael does behind the wheel of KITT-and just as old, as does Ed Crick who exists as a double-edged sword for the young John, as his charisma could herd John toward evil or good-the former with KARR lurking about.
The episode is very well paced and doesn't look bad 20-something years later. It also fullfills the curiosity one must have about KITT falling into the wrong hands and having his powers misused. If nothing else the repeated appearence of KARR should've been a recurring foil for Michael and KITT. It might've even gotten the show more mileage.