Indigo with Benjamin Orr of The Cars on lead vocals.
Cap'n Swing was a Boston nightclub band in the mid-seventies; that with the addition of David Robinson and a few other changes became The Cars in 1976. "Indigo" was re-worked and released as "Wake Me Up" in 1999, on the bonus disc included with that years' re-issue of The Cars self-titled debut album as The Cars Deluxe Edition.