Yet another media company is trying to put a stop to online TV streaming startup Aereo’s plans for expansion across the country.

This week, Hearst Stations, which owns the ABC affiliate WCVB-TV in Boston, filed for an injunction that aims to halt Aereo’s rollout in Beantown, where it launched in May 2013. Aereo uses a massive set of tiny antennas to capture over-the-air television and then effectively re-transmit it over the Internet to consumers’ digital devices.

Media companies aren’t happy with Aereo’s plans to expand in Boston and other cities across the country. Aereo itself has already sued CBS as a way to halt the flood of copyright infringement suits. The company suspected that if it didn't take preemptive action, lawsuits would follow it around the country—but it looks like that's what is happening in any case.

According to Hearst's lawsuit, "If Aereo is permitted to profit from the unauthorized retransmission of copyrighted television programming, WCVB will be deprived of existing and potential revenue streams from advertising and authorized retransmissions."

Aereo, for its part, believes that it’s totally in the clear.

“We don't think of it as a loophole,” CEO Chet Kanojia told NPR’s On The Media in May 2013. “This is what the expectation Congress has had. Hey, spectrum was granted to broadcasters to program in public interest free of charge. They make money in advertising and let the consumers have antennas so they can pick it up. We just basically took that and brought it into the modern age.”

In April 2013, before the Boston launch, Aereo won a major victory before the US Court of Appeals for the 2nd Circuit in New York. Traditional broadcasters are now asking for an “en banc” appeal of that case, with broader legal arguments. However, if the Boston case ends up in appellate courts, the New York case won't be a binding precedent, since Massachusetts is in the 1st Circuit.