Tricky Van Baalen

 was the youngest of the Van Baalen brothers.

He worked for his brothers, finding and processing salvaged spaceships. Although made captain by their father, he suffered an accident, in which he lost his eyes, his voice, and his memory. He was later fitted with synthetic eyes and a partially electronic-sounding voice box; unable to replace his memory, his brothers instead convinced him that he was in fact an android.

When the brothers discovered the TARDIS in their ship's orbit, all three boarded it under the belief that the Eleventh Doctor was describing it as "a salvage of a lifetime", but who had trapped them inside in a desperate attempt to find Clara. Whilst inside the TARDIS, Tricky became trapped by a metal beam, and his brother Gregor refused to cut his arm, confessing that he was human. He was also chased by a future "zombie" version of himself, but their discovery of the TARDIS was negated when the Doctor altered their timeline.

When the timeline reverted however, a photograph of the three brothers and their father remained intact (it had previously been torn to omit Tricky as part of his brothers' ruse), and Gregor treated him with more respect. (TV: Journey to the Centre of the TARDIS)

Personality
Before the salvage accident which cost Tricky his sight, voice and memory, he was described as the smartest of the van Baalen brothers, and the one who was best suited to be captain of their salvage ship. He was easily the most compassionate brother, being the first to realise that the TARDIS was suffering and often acted as Bram and Gregor's consciences. He also warned the Doctor that if he went into the TARDIS to rescue Clara he would be poisoned and was the only brother who was willing to help without asking for anything in return. When Bram was killed by Clara's Time zombie, the Doctor realised that Tricky was more "cut up" about it than Gregor was.

After his amnesia, Tricky thought he was an android due to his synthetic eyes and voice box and was convinced that he could not feel pain or fear, to the point where he believed that if Gregor cut off his arm, he wouldn't feel it. Tricky was outraged when he realised that his brothers had lied to him but the Doctor reminded him that Gregor still had a scrap of decency since he had refused to slice off his arm. Tricky was brave enough to fight against one of the Time zombies in order to protect the Doctor, Clara and Gregor and almost fell into the Eye of Harmony in the process. After the Doctor rewrote time, the three brothers appeared to have become closer than before, despite being unable to remember their adventure. (TV: Journey to the Centre of the TARDIS)