The Super League sides make their bow in the Challenge Cup as the prestigious competition reaches the fourth-round stage, with Hull KR hosting St Helens in Saturday's televised tie on BBC Sport.
St Helens have won the trophy 12 times, latterly in 2008, but injuries and indifferent form mean they are in serious danger of suffering their first opening-round defeat since 1995.
You can also follow Super League XVIII each week on BBC TV with the Super League Show. Presented by Tanya Arnold plus top guests from the sport in the studio, the programme rounds up the best of the weekend action together with incisive comment and features on the game's top personalities.
Challenge Cup fourth round
Saturday, 20 April
Hull KR v St Helens: 1415-1630, BBC One
Super League Show
The programme goes out every Monday at 23:35 GMT on BBC One across the north of England. If you are a satellite or cable viewer you can access these BBC regions via your EPG to watch the show then.
Channel Sky Freesat
BBC Manchester 958 955
BBC Newcastle 955 956
BBC Leeds 956 966
BBC Hull 957 967
The programme is also shown across the UK on BBC Two on Tuesday:
Tuesday 26 February: 1330-1415, BBC Two
Tuesday 5 March: 1330-1415, BBC Two
Tuesday 11 March: 1330-1415, BBC Two
It is then available for the rest of the week on the BBC iPlayer
For a full list of radio commentaries of Super League games,