A screen used "Tribble"! "Star Trek: Deep Space Nine" entitled "Trials and Tribble-ations" (Season 5, Episode 6, first aired November 4th, 1996, which was written for the 30th anniversary of the original 1966 "Star Trek" series), the DS9 crew are forced to travel back in time after they discover that a discredited Klingon spy has transported himself back to the Enterprise to assassinate Captain James T. Kirk. The crew must stop this assassination without actually altering anything from the past. In this episode we also see the infamous "Tribbles" which first appeared in the original 1967 series episode, "The Trouble With Tribbles" (Season 2 Episode 15). With the use of the magic of special effects, this very special DS9 episode actually allowed the crew to interact with the original crew using archive footage of the entire original crew (including William Shatner, Leonard Nimoy, DeForest Kelley, James Doohan, Nichelle Nichols and Walter Koening). This is a Tribble from this DS9 episode. Approx. 4" diameter of white synthetic fur. A panel of industry experts not affiliated with Premiere Props in the movie & TV memorabilia business has authenticated this item. This item now includes three levels of security: 1) DNA laced invisible ink – a 9-digit code laced with DNA ink is placed on an appropriate place of the prop/costume and can be only viewed using a high-frequency UV light. The chances of replicating the specific DNA sequence which is unique to MPDNA is 1 in 33 trillion. This DNA sequence is so secure it is admissible in a court of law.?? 2) Archival Microchip Encrypted Tag - a patented, acid-free, 1"x 3" tag with an encrypted microchip is placed onto the Certificate of Authenticity. The microchip contained within the tag contains all of the pertinent information about the prop or costume. The tag is tamper proof and the microchip is encrypted, making it impossible to duplicate.? 3) The certificate also has the 9-digit DNA invisible ink mark which must match the 9-digit invisible ink mark on the prop. This will ensure that it is a genuine prop issued by Premiere Props and authenticated by MPDNA.