Jenkins joined the Pilgrims on an initial month-long loan on Friday and started his new team's comeback during a 3-2 win away at Morecambe.
Joe Garner came on as second half substitute on his return to Carlisle United in their goalless draw against Crewe Alexandra, and followed that up with 84 minutes as the Cumbrians earned an impressive 2-1 victory against Coventry City at the Ricoh Arena.
Garner, who was returning to the club he left in 2008, was in the thick of the action, winning a penalty which was duly converted by Danny Cadamarteri.
Fellow Hornet Piero Mingoia has appeared for Accrington Stanley in both games since he joined the club on loan; coming on against both Aldershot Town and Chesterfield as a second half substitute.
Mingoia replaced team-mate and good friend Matt Whichelow against Chesterfield. Whichelow had also been a substitute against Aldershot.
Adam Thompson has been an unused substitute in Wycombe Wanderers' last two games - defeats which ultimately led to the sacking of Gary Waddock.
Britt Assombalonga has been the stand-out performer for Watford's loanees so far this season, with an impressive five goals in seven league starts since he joined Southend United.
Assombalonga has failed to hit the target in his last two outings but has played a large part in Southend’s solid start to this season.