According to Nielsen Media Research, "Greg Pikitis" was seen by 4.96 million household viewers, only a slight drop from the previous week despite direct competition from the 2009 World Series.
This was a 29 percent increase from the previous episode's 1.7 rating, though that episode's low ratings have been attributed to the unexpected end to the 2009 World Series.
2009 | World Cup | ATP International Series | FIFA World Cup | World Trade Center | World Series | 2010 FIFA World Cup | World Bank | World Health Organization | Guinness World Records | 1978 FIFA World Cup | World Series of Poker | Allies of World War II | ATP International Series Gold | BBC World Service | Star Trek: The Original Series | ATP World Tour 250 series | World Heritage Site | Buffy the Vampire Slayer (TV series) | World Boxing Association | World Boxing Council | 2006 FIFA World Cup | World Wide Web | As the World Turns | World Trade Organization | series | ATP World Tour 250 Series | World Rally Championship | Gossip Girl (TV series) | Casualty (TV series) |