In the next year, 1970, he played in Daniel Boone, season six, as Tamenund. In the "No Way to Treat a Relative" episode of the 1973 situation comedy Needles and Pins (never broadcast because of the show's cancellation), the Kojak episode "Both Sides of the Law", the 1977 The Bionic Woman episode "Doomsday is Tomorrow", the 1981 Buck Rogers in the 25th Century episode "Time of the Hawk", and the 1981 miniseries Masada. In 1986 he played an Iranian ambassador in the TV thriller Under Siege, about Islamic terrorist attacks in the United States. On October 30, 1989, Opatashu guest-starred as the Tenctonese ex-slave "Paul Revere", in the episode "Night of the Screams", of the television series Alien Nation. In 1991 he won an Emmy Award for his guest appearance in the episode "A Prayer for the Goldsteins" of the ABC series Gabriel's Fire.