Doonesbury by Garry Trudeau for March 30, 1971
Transcript:
Mark: Mom! Dad! I'm home! Dad: So, son, home from college, are you? Mom: Welcome home, dear. Dad: O.K., son, lay it on me. Tell me where your head's at, and maybe we can get it together. Like, let's generate some good vibes. Wow! Heavy! Dig it! Mom: He's been watching "Mod Squad."