 Having finished his case for the prosecution. The Valeyard(Michael Jayston) has no choice but to allow the Doctor(Colin Baker) to begin his presentation for the defence. Having being afforded the same privileges as the Valeyard and being allowed access to the Matrix. The Doctor presents evidence that takes place in his own personal future. Now in the company of a new energetic traveling companion called Mel(Bonnie Langford), the Time lord is forced to guide the TARDIS to a luxury space cruiser called the Hypherion III. A star-liner that ferries between the planets of Moga and Earth. Having being forced to arrive on the star-liner as the result of receiving a distress call from within the vessel. The Doctor and Mel are caught by a security officer as they wander the cargo hold of the ship. Presented in front of Commodore Tonker Travers(Michael Craig). An old acquaintance of the Time lords. The Time lord is dismayed to find the commodore is far from pleased at the Doctor s presence. Knowing that whenever the eccentric time traveler makes an appearance, all hell normally breaks loose. Confined to guest quarters. The Doctor and Mel attempt to discover who sent the mayday call. But It s an investigation that will lead to a more alarming threat than they both dared to imagine. As the ship is eventually thrown in to chaos as a result of the very machinations of certain villainous crew members and a genetically engineered breed of mutant plant life which have christened the title of  Vervoids .