Smells like Helvetica.
Most of the new TWC uses Helvetica. The IS also has Interstate and Frutiger (the latter is for WxScan), the XL uses Akzidenz-Grotesk (look at the R in Akzidenz and Helvetica as distinguishing), and there's a few other font oddities in the TWC history books. (Gill Sans was the font du jour during the No Place on Earth era, for example.)