Bernice Summerfield's Time Ring

Bernice Summerfield owned a Time Ring which was given to her by the Seventh Doctor and which worked in tandem with Jason Kane's own Time Ring.

Benny eventually destroyed both of the rings when they turned Peter into a violent adult. However, the Wyrm was able to repair Benny's and make it capable of travelling through time without having to be used with Jason's. It eventually ran out of power.

History
Muldwych acquired a Time Ring which split into two. He gave them to the Seventh Doctor to give to Bernice Summerfield and Jason Kane at their wedding but would not tell the Doctor how he had acquired them. The Doctor told Benny and Jason that they could travel through time by knocking their two rings together, (PROSE: Happy Endings) but that they had to ask nicely. (PROSE: Eternity Weeps)

When Benny and Jason parted ways with Isaac Summerfield II, Jason promised that they would visit using their Time Rings. They used their rings to return to the 26th century. (PROSE: Return of the Living Dad)

Benny forcibly clinked her ring against Jason's to summon the Doctor and they both felt that their futures were sent off in different directions because of it. Jason later stole hers to travel back six billion years to Cthalctose and back. During their divorce ceremony on the Moon, he returned it to Benny. (PROSE: Eternity Weeps)

Following the divorce, Benny stopped wearing her ring and found that her finger felt strange without it despite having only worn it for a matter of months. (PROSE: The Dying Days, Oh No It Isn't!, etc.) She carried it with her for a while before, not wanting to be continually reminded of Jason, she put it aside. (PROSE: The Collection)

Jason, assisting the People, visited Benny at St Oscar's University and stole her Time Ring. The People used the two rings to create a time path, taking Jason with them to Babylon. When Benny found Jason, they used their rings in an attempt to return home, (AUDIO: Walking to Babylon) but Benny arrived in 1909 with her ring whilst Jason arrived in 22000 with his. (AUDIO: Birthright) Before finally returning home, they inadvertently travelled to World War II. (AUDIO: Just War)

Although Benny did not want to use her Time Ring again, Jason used both of them and took them to the 2150s where they fought the Grel. (AUDIO: The Grel Invasion of Earth)

Benny was able to convince Jason to use their Time Rings to travel back in time in search of Britney Spears CDs for Irving Braxiatel. (PROSE: A Mutual Friend)

After Jason activated an alien time machine in the Pons Asinorum with his Time Ring, Benny used hers to follow him. They then used them in tandem to return to the Braxiatel Collection. (PROSE: The Collection)

Jason gave his and Benny's rings to Peter, who transported the three of them, as well as Joseph and Sophia, to the Festival of Piranha. Further uses took them to Ancient Egypt, a jungle, a volcano, a motorway, a football match, the Eiffel Tower and, as Peter lost control of the rings, numerous other places. The rings transformed Peter into an adult until Benny shot and destroyed the rings, restoring him. (AUDIO: Professor Bernice Summerfield and the Grel Escape)

Benny's ring was drawn back in time by the Wyrm and repaired, becoming capable of time travel without needing Jason's. The Wyrm sent it into the future in an attempt to bring Benny back in time, but it instead went to Peter and took him to prehistoric Earth. Peter dropped it into a volcano where it remained for millions of years until Benny dug it up and went back in time to find her son. She later used it an attempt to return to her ship. (AUDIO: The Adolescence of Time)

Detected by Straxus whilst travelling through time, his Time Ring sapped Benny's of its power and left her stranded in 1893 London. Straxus later restored its power, along her to return to Peter on their ship. (AUDIO: The Adventure of the Diogenes Damsel)

At Adrian Wall's insistence, Benny gave her Time Ring to her clone for a time to complete the illusion that she was actually Benny. She also learnt that it was connected to a painting of hers which was part of a failsafe used by Braxiatel to download his mind into a clone should anything happen to him. (AUDIO: Glory Days)

Benny used her Time Ring to access a temple which was slightly out of sync with the present. (AUDIO: Secret Origins)

Using her Time Ring, Benny travelled back in time to 21st century Mars whilst investigating the Deindum. (PROSE: Excalibur of Mars)

The Time Ring protected Benny from being rewritten when her plan to change the history of the Deindum was successful. This resulted in it losing almost all of its power, (AUDIO: Year Zero) the last of which she sacrificed to try to save Otek. (AUDIO: Dead Man's Switch)

Legacy
Benny credited her Time Ring for her youthful appearance. (PROSE: Big Bang Generation)