P is for... Psi

Psi was one of the people recruited by the Doctor to help rob the Bank of Karabraxos - notorious for its high levels of security. None of the thieves knew that the Doctor was behind this heist - even him, as they had all willingly handled a Memory Worm which wiped their recent memories. This was so that they couldn't reveal anything if captured. The bank employed a creature known as the Teller which could psychically sense guilt.

Each of the gang was promised a reward - something which the bank held in its vaults. Psi had undergone a technological upgrade which allowed him to interface directly with any computerised systems. In doing so, his longer term memories had been removed and stored on a chip, and getting this would be his reward. 

They were also given a suicide device - a ripper - to use in the event that the Teller caught them and destroyed their brains seeking their guilt. After helping to breach the security systems, Psi sacrificed himself by downloading data about various notorious criminals into his mind, which drew the Teller away from the Doctor and Clara. This then allowed them to reach their goal - actually the rescue of the Teller's mate.

It later transpired that the ripper was really a teleport, which took them to the safety of the TARDIS. Psi gained his memory chip, which allowed him to recall his family.

Played by: Jonathan Bailey. Appearances: Time Heist (2014).

• Pretty much everywhere these days, he started off as a child actor with the RSC and also played Gavroche in Les Miserables in the West End. His first significant TV role was as the corruptible local journalist in Chris Chibnall's Broadchurch.
• Period drama Bridgerton really put him on the map, before he moved to the big screen with Wicked and its sequel, and the male lead role in Jurassic World Rebirth.
• He hasn't given up the theatre. I saw him in the title role of Richard II at the Bridge Theatre in London in 2025.
• In 2024 he set up an LGBTQ+ charity - The Shameless Fund.
• Voted sexiest man alive in 2025.