Doctor Who: 14 Cool Details In Steven Moffat & David Tennant's Silence In The Library Commentary

3. River's Squareness Gun Is The Exact Same One That Captain Jack Harkness Used

Doctor Who Silence In The Library River Song squareness gun
BBC Studios

Near the end of the episode, River uses her squareness gun to create an opening in a nearby wall, allowing herself, the Doctor, and the rest of the group to escape the Vashta Nerada - who have taken control of Proper Dave's spacesuit.

This squareness gun looks similar to the one used by Captain Jack Harkness in Series 1's The Doctor Dances, and as revealed by Moffat, that's because it is the same one.

Jack took the gun onboard the TARDIS at the end of that episode, and since he didn't expect to be left behind in The Parting Of The Ways, he left his belongings - including the squareness gun - inside the TARDIS.

And as we now know, River has been in the TARDIS plenty of times, and one day, she picked up Jack's gun, which is why she has it with her in Silence In The Library.

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Danny has been with WhatCulture for over ten years, and is currently Doctor Who Editor and WhoCulture Channel Manager, overseeing all of WhatCulture's Whoniverse coverage. In 2022, he took charge of WhoCulture and has grown it into the biggest Doctor Who channel on YouTube, and one of the biggest Doctor Who communities on the web full-stop. He has been writing and video editing since his early teens, and first got a taste for content creation after making his own Doctor Who trailers, off the back of a burning obsession with the Matt Smith era of the show. Like many his age, he first got into Doctor Who with the 2005 revival, but has since gone back and fallen in love with the classic years too. If you need someone to recite every Doctor Who episode in order, or to give you a random factoid about the making of Gridlock, Danny is the person to ask!