Heroes is moving full speed ahead with volume four of the show.

In fact, Zachary Quinto recently shot the episode that introduces his character's real dad, played by John Glover. The actor offered the following critique to Entertainment Weekly:

"He was the perfect choice," Quinto said of Glover. "The only downside was that we shot our scenes outside in a tarpaulin shack and it was pouring rain for two days, so we were literally slogging through mud. The logistics weren't that great, but the experience was. It traded off in the end."

Sylar is getting ready to meet daddy.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.