LOS ANGELES (Hollywood Reporter) - Fox is producing fresh episodes of its animated comedy "Family Guy" without the participation of its striking creator Seth MacFarlane, who does many of the main voices, sources said.

The last episode completed before the Writers Guild of America strike began November 5 aired Sunday. Fox and sibling studio 20th Century Fox TV had the choice of going into reruns or continuing the show without MacFarlane, whose outspoken defiance of his employers has made him a cause celebre for striking writers.

After a large writers rally outside the Fox lot on Friday, where he was one of the speakers, MacFarlane said the studio could proceed without him, though he hoped it would not.

20th TV had no comment on the matter Tuesday but confirmed that it remains in production on new episodes. The first episode finished without MacFarlane's blessing has been delivered to Fox. Sources said it is one of three very close to completion, with others in various stages of production.

In addition to executive-producing the show, MacFarlane voices the characters of Peter, Brian and Stewis Griffin, the male members of the hapless Rhode Island family at the core of the domestic satire.

Reuters/Hollywood Reporter

Frankly, I thought this show went downhill after the first season. But without
creator Seth MacFarlane (who voices three of the key characters), it will hit
rock bottom. I don't know how they can replace him; they will probably end up hiring three actors to voice Peter, Stewie and Brian. Viewers are going to
notice the difference. That's for sure.

I am pretty sure the voices have already been recorded. Fox wouldn't simply replace the voices.