The Box of Delights (TV series)
Patrick Troughton was a familiar face on BBC TV from playing the Second Doctor in "Doctor Who"; a contemporary "Blue Peter" feature on the drama makes the connection that in the role of Cole Hawlings, the kindly Punch and Judy Man, Troughton was playing another mysterious, scruffy time traveller. Renny Rye noted that Troughton "who was my favourite Doctor Who...had a quality that is unsurpassed, I think, as someone to pull you into a tale."
Tooth and Claw (Doctor Who)
Pauline Collins appeared previously in the series as Samantha Briggs in the Second Doctor serial "The Faceless Ones" (1967). This makes her the third actor from the classic series to appear in the new series, following William Thomas ("Remembrance of the Daleks" and "Boom Town") and Nisha Nayar ("Paradise Towers" and "Bad Wolf"/"The Parting of the Ways"). Collins had been offered a role as a companion in 1967, but had turned this down. According to the accompanying episode commentary, actor Tom Smith, who played the Host, attended drama school with David Tennant.