David Tennant's much anticipated portrayal of the notorious serial killer Dennis Nilsen finally hits screens in the UK this evening.Fans in the UK can tune in to episode one tonight from 9pm on ITV. Episode two will air tomrrow night at 9pm with the third and final instalment coming on Wednesday at the same time. The series will also be available on catch up on the ITV Hub.A DVD and Blu-ray release in the UK will take place on 12th October and it can be pre-ordered from amazon.co.uk here Australia will see Des beginning on 15th September on streaming service Stan. A 30 day free trial for the service is available. Find out more on their website here Fans in the USA, Canada and the Caribbean can look forward to watching Des on the streaming service Sundance Now. No dates for it dropping have been released as yet so stay tuned.DirecTV has secured rights to the show in Latin America while TVNZ has the rights for New Zealand.European deals for Des include a pan-territory acquisition …