Scooby-Doo, ¿dónde estás?

Velma's famous line, "My glasses, I can't see without them!" was not originally scripted for the show. During a table read for the voice artists, Velma's voice-over actress Nicole Jaffe, who was near-sighted as well, lost her glasses and uttered a variation of what became Velma's famous catchphrase. The writers liked the line so much that Velma losing her glasses became one of the show's trademark gags. Velma loses her glasses in the first episode, What a Night for a Knight (1969), but the actual line is first spoken in Decoy for a Dognapper (1969).

The re-run prints that first aired on CBS in 1971 feature standardized opening title music for all first season episodes. A number of the first season episodes feature alternate opening (and/or closing) theme music (see trivia). Excepting prints aired on cable between 1990 and 1998 (which were time-compressed copies of the original broadcast prints, all but the first two missing their laugh tracks), all re-runs of this show use the 1971 prints.

Edited into Scooby-Doo Goes Hollywood (1979)