The Mod Squad (1968)

S3E24 The Price of Love

During a road trip, Linc's motorcycle unexpectedly fails him, leading him to an eerie, deserted town. As he explores, he stumbles upon a boy who has been kidnapped and is being kept for ransom. The kidnappers, realizing Linc has witnessed their crime, choose to capture him too, intending to leverage him as leverage until they receive the ransom payment.