Sunday 8.00pm Alien Investigations Channel 4 - Documentary examining four of the most bizarre alleged alien sightings from the past five years to discover whether they were really visitors from another world. 9.00pm Steppin' Out with Katherine Jenkins ITV1 - The opera star both sings and dances in this all-star cabaret show which capitalises on her recent appearance on America's Dancing with the Stars. Guests featured on the programme include Il Divo, Tom Chambers, Stooshe and Britain's Got Talent finalists Only Boys Aloud. 9.00pm Solar Mamas BBC4- Documentary exploring why women from poor communities are making the decision to train as solar engineers in Rajasthan, India. 10.00pm The Only Way is Essex: Live ITV2- The return of the popular constructed reality show kicks off with a two-part live episode. 10.30pm British Comedy Awards: Nominations Show Channel 4 - Ahead of the ceremony, which will be broadcast on the 12th December, Miranda Hart reveals which programmes and personalities have been nominated for British Comedy Awards. Monday 7.30pm The Royal Variety Performance ITV1 - The Queen and Prince Philip attend the 100th anniversary of the Royal Variety show which this year is presented by David Walliams and emanates from the Royal Albert Hall. Walliams' fellow Britain's Got Talent judge Amanda Holden will present a special portion of the programme highlighting the most popular acts from the talent show including Spellbound, Diversity, Paul Potts and this year's winners Ashleigh and Pudsey. A long list of other acts includes Bruce Forsyth, Ronnie Corbett, Girls