The VOICE of Sqweegel was performed by Rino Romano, who also voiced it in Level 26. He played Batman previously, and is the Narrator on the Curious George cartoon series.
Sqweegel originated in the novel Level 26: Dark Origins (2009) by Anthony E. Zuiker with Duane Swierczynski, and had been played by Daniel Browning Smith in its "cyberbridge" companion videos. The car wash sequence (from where Sqweegel gets his name) is also from the book. The episode's broadcast date coincides with the release date of its sequel Level 26: Dark Prophecy (2010).