Just curious and if so, when? I was watching a Nolan North interview and he said he does a transformers show with Frank Welker. After doing wiki search, North's bio states that he's sideswipe. EDIT: http://www.giantbomb.com/northern-exposure-our-chat-with-nolan-north/17-5394/ It happens around the 31:00 minute mark, it's super quick but he mentions that he does a show with Frank Welker. Seeing as how we know that TF Prime takes at least a year to produce an episode, it's entirely possible for these two to have been working together for quite a long time now. EDIT 2: It seems where he's credited for playing Sideswipe in Prime has been removed form his wiki page.