Left-sided midfielder/defender Paul made 15 appearances for us after making his debut at Chelsea in September.
Young defender Stephen, 20, impressed in his spell at Watford, where he made 13 appearances.
He also did well at QPR last season - playing in the Division Two Play-Off Final - and has recently returned from representing Ireland in the World U20 Championships.
Midfielder 'Jacko', also just 21, scored two goals in five appearances at Coventry, including the winner against West Brom on Saturday.
Charlton have recalled Paul Konchesky from his loan spell while we've recalled Stephen Kelly and Johnnie Jackson from their respective loans at Watford and Coventry City.