Question: Victor Garber plays the role of Dr. Martin Stein on the web series on what streaming platform?
Sentence (from "Vixen (web series)"): Vixen is an American animated web series from executive producers Greg Berlanti, Marc Guggenheim and Andrew Kreisberg, which debuted on August 25, 2015, on The CW's online streaming platform, CW Seed.
Relevant evidence: Yes