My Secret Identity - Season 3 Episode 8 Bump In Time
Overview: Andrew is late for his first day at work, and in a hurry to get there, runs into a tree and is knocked out. When Andrew awakens, he finds himself back in time in the 1960s. The adventures and friends Andrew meets there, prompts him to think about whether he really wants his job, or whether to assist Dr. J plant trees to help the environment instead.