The US naval thriller reaches its finale, having been cut short early by TV chiefs unimpressed by poor viewing figures in the States. But rather than just sink without a trace, the drama promises to go out with a bang as a violent battle erupts on the submarine, leaving the crew vulnerable to capture
from a third party with ulterior motives. The Undateables (Channel 4, 9pm) Some of the contributors from the first series reveal whether they have found love almost a year later. The programme catches up with amateur radio enthusiast Richard, who has Asperger's syndrome and Shaine, a prolific poet from Bournemouth with a learning disability.