The opening scenes where Dr. Kimble is being chased by two police officers in a train yard are the same exact scenes used midway in Nobody Loses All the Time (1966), which aired earlier in season 4.
At the very beginning, Kimble, i.e. David Janssen, enters a store with a similar name to the actor's: Jensen Grocery.
The large sign advertising 'Cardinal Ice Cream' on the facade of the Jensen store looks uncannily similar to the logo (same color and font style) used by Carnation, a famous manufacture of milk products dating as far back as 1899.
Dabbs Greer, who plays Jensen, is making his sixth and final appearance in the series. Each time he plays a different role.