The U.S. Supreme Court will soon decide the fate of Aereo Inc., the start-up company that streams popular TV shows without paying a cent in retransmission fees to broadcasters. So Aereo understandably isn’t thrilled that a similar company called FilmOn X LLC, which has a long and bizarre history of antagonizing Aereo, now wants to share the stage at oral argument.

The high court agreed last month to hear an appeal by American Broadcasting Companies Inc. and other broadcasters in a copyright infringement case they brought against Aereo. Now, in a 15-page motion filed on Friday, FilmOn’s lawyers at the small Los Angeles firm Baker Marquart want the high court’s permission to intervene in briefing and the not-yet-scheduled oral argument. (Eriq Gardner of The Hollywood Reporter first reported FilmOn’s motion.)