In 2371, he visited Deep Space 9, and broke into the infirmary. He tried to steal several hundred milliliters of bio-mimetic gel, when Dr. Julian Bashir walked in on him. He telepathically attacked him, leaving Bashir in a coma for several hours.
Altovar was played by Victor Rivers.
His costume was sold off on the It's A Wrap! sale and auction on eBay but named as a Kazon/Illyrian costume.  It was later sold again through eBay and the current owner found several name tags in this costume, parts worn by Tom Morga, Eric Hunter, Ken Wood, Mick T., Mickey Cassidy, Scott Hill, Jon Wright, David Winburn, and Tom Miller throughout Deep Space Nine, Voyager, and Enterprise.
According to the script, Altovar was pronounced as "AL-toe-var".