The ChR Infinitus was a Romulan starship that was in service of the Imperial Romulan Star Navy in the late 23rd century. By the late 2260s, the Infinitus was under the command of Subcommander Gaion.

In 2269, the Infinitus was attacked by unknown forces, but managed to send out a general distress call asking for immediate assistance, which was picked up by the USS Enterprise Captain James T. Kirk, however, had no wish to interfere with matters close to Romulan Neutral Zone and ordered Montgomery Scott to take the Enterprise to continue on to her next mission. (TOS video game: Judgment Rites)