Among the similarities that CBS added to its lawsuit this week were that both shows feature an "obligatory older" and "openly gay" player, "showmances" as a plot element and "generally comfortable, cloistered house" environments.

CBS says "Glass House" violates copyrights and trade secrets from "Big Brother" and alleges that dozens of former "Big Brother" staffers and producers now working with ABC on "Glass House" may have violated non-disclosure agreements.

The seventh episode of "Glass House" aired Monday on ABC.

The 14th season of "Big Brother" is currently airing three nights a week on CBS.

A spokesman for ABC said the network has no comment about the updated lawsuit.

ABC lawyers previously said "Glass House" is different because many of the contestants' decisions, and who remains in the house, are made by audience votes. Only the first season of "Big Brother" allowed viewers to choose which houseguest was evicted.